Comments: I had my racquet restrung last week with NRG2 17 gauge black. I have tried a variety of strings the past 2-3 years and this string improves my game. I know it will be worn out in 2-3 months, but that's okay. Unless you are a super big hitter and playing tournament or college level tennis and needs polyester; short of VS Gut, this is the most likely choice for at least 75% of club players.
From:Robert, 3/6/20

Comments: I like this string a lot. This has been my default cross string in my hybrid setup of Yonex Poly Tour Pro 17 mains at 55 pounds for several months now. I experimented for quite a while trying to find a good complement for the Yonex Poly Tour Pro, and NRG2 does a great job of taking the edge off the poly while preserving the slightly flat or dead feel I prefer. As others have noted, the downside for this string is durability. At 55 pounds I get 6-8 sets before either breaking a cross or significantly fraying one. At 50 pounds I only get 4-6 sets; the lower tension lets the mains saw on the crosses more. After I go through my current supply of NRG2, I might go looking for something more durable in the crosses, but for the 4-8 sets it stays in the racquet, I haven't found anything that beats it. If you can afford the higher price and don't mind restringing more often, try this.
From:Patrick, 9/23/19

Comments: These aren't the right strings for me in my current racquets. I completely disagree with the comments saying this is buttery smooth. I mean, sure, in comparison to a poly these are soft. But in the multi word, no. In my Volkl Super G 10 Mid 320 racquet with a stiffness of 70, these strings make the racquet feel even more stiff to the point of unplayable. I've also strung this string in Yonex VCore Tour G that has a lower flex rating and a 16x20 in comparison, and it's slightly better. I believe the softer flex with the more dense string pattern allows for the characteristics of the string to perform better. That being said, I don't recommend this string because it is okay at best for a fairly high price.
From:Ian, 10/12/18

Comments: Ordering my second reel of this stuff today. Found that this is a pretty good alternative to Wilson NXT 17. For me it has been equal in terms of arm friendliness and definitely more durable than NXT. I can get 10-12 sets out of this stuff. NXT was only lasting 6-8. One time however, it did break after only an hour and not in the center of the racquet, so I'm a little suspicious about the string having some defective spots, but then again the string could have notched it while stringing it.
From:Steve, 10/11/18

Comments: Simply the best string I've ever played. It not only offers exceptional spin, but power that's controllable. It bites sharply on slices and volleys and has tremendous feedback to the palm. It take less of a toll on the wrist, elbow and shoulder when battling in a 3 set match and rewards the player when taking a full cut at a ground stroke. It excels on the heavy slice or kick serve but gets a little tricky on a flat one. The only 2 drawbacks are the durability and the price. It only lasts me about 7 sets or 4 hours approx. before they snap. The high altitude balls (they're slightly harder than sea level balls) might contribute to the short lifespan of this 17g string. If you're looking for the ultimate in comfort,power and control in a string that isn't gut, this Technifibre NRG2 17g is exquisite. I play in Colorado in the 55 and over senior division.
From:John, 8/8/17

Comments: I left feedback a month ago and here is an update -- The strings do fray much sooner than other multi strings I've used. Otherwise they are excellent strings.
From:Henry, 5/26/17

Comments: I agree with Jay. These strings have a soft buttery feel, and good spin. Excellent for someone with arm problems. Not sure how long it will last, as I haven't used it many times yet.
From:Henry, 4/21/17

Comments: I have this string in my Babolat Pure Strike 16x19 2017 racquets and all I can say is that the combination of Pure Strike 16x19 and Tecnifibre NRG2 is really a perfect one! For a couple of weeks I played with RPM Blast 17 string in my Pure Strike but due some upcoming elbow problems I switched to the NRG2. The NRG2 provides me some extra power in comparison to the RPM Blast, but the feel and control are at least the same or even better. My elbow problems seems to be history now and I can place the bal everywhere I want from the baseline and also with my volleys.Durability so far is really good; after playing many hours of hard hitting no signs of wear or displacement of strings are visible. For me, NRG2 is the best overall string I have ever used and despite the fact that it is not one of the cheapest strings on the market I will go on with this lovely string.
From:Jan, 10/16

Comments: This string works well on my Wilson Juice Spin Racquet with good feel and very good control. I usually get the racquets strung at around 59-60 lbs. The main problem with using this string on an 'open' pattern spin racquet is that durability is horrible. Strings break after about 3 sessions of play. It is good for someone who doesn't mind stringing often but otherwise durability is lacking. I'm a 4.0-4.5 primarily doubles player;
From:Bob, 9/15

Comments: Very happy with this string. It doesn't generate as much spin as polys but more than makes up for it with superior feel and comfort. I string my racquets loose so it generates plenty of pace. I'm a 4.0 player.
From:Gordon, 3/15

Comments: I tried the 17 gauge version this string on my Wilson BLX Tour 90 and Wilson Six One 95 (16x18), both at 51 lbs. tension (full bed). This string has the best feel, playability and tension retention in a multifilament. I have tried almost all major brand multifilament strings over the years in these rackets and none comes close. Durability is also better than other multifilament strings. Wilson Sensation 17 had acceptable feel but not as good as NRG2 17 and durability was very poor. NRG2 17 also provides excellent ball pocketing. Going forward this is my string of choice. I am a 4.0 senior player with mostly flat shots with some spin on serves and a single handed backhand. This string provides plenty of spin for my game when I need it.
From:Dushyant, 9/14

Comments: I have been using these strings in a Wilson Juice L strung at 45 lbs. Loved the feel initially -- nice combo of softness and control. Unfortunately, after about 8 to 10 hours of play they either snapped or locked up and felt totally dead. Think I will keep shopping for a more durable string.
From:Sandy, 7/14

Comments: After hearing all of the positive reviews on this string, I decided to give it a shot. Since I string my own racquets, I like to buy different strings and try them out. I am a 4.5 player and played some college tennis at a small university. These strings played well and were very arm friendly. Unfortunately for me though, they broke after only one session of tennis. By far the least durable string I have tried. I gave the X-One Biphase a shot as well and they broke prematurely too. Maybe I just happened to get a few bad packages of Tecnifibre string. I have been playing for 20 years am a professionally trained stringer and have been stringing my own racquets for the last 10 years, so I don't think it was 'user error' on my part. Was pretty bummed because these strings should be right up my alley since am prone to arm pain and don't mind paying a little extra for a premium string.
From:Brock, 6/14

Comments: These strings are phenomenal! I am primarily a flat hitter and these strings are perfect for me. I use a KBlade 98 18x20 string pattern 57lbs; very dense and suitable for my hitting. The strings are very soft and hold tension pretty well. Only downside that many have said before me, the durability is lacking. These strings will fray just like gut, but man will these puppies break. I will go through an 6 hour session and i will notice the strings about to snap. I'd give it 10 hours max depending on your hitting style and power; maybe even shorter as some have said. What's great is the feel. I can't express the softness and beauty of these strings. Technifibre really did their research and put lots of time into these strings. I wish they were cheaper because i can no longer afford to restring my racquet ever 1/2 days. Other poly strings are great, but once you find what you love, it's hard to like anything else. Give these a go, it's a good try/investment.
From:Patrick, 3/14

Comments: Best strings I've ever used. I have used these for years, then had some elbow problems (using a stiff racquet), and switched to Technifibre Multifeel. It was easier on the elbow, but I finally realized I'm not 35 anymore, and don't/can't hit the ball through a player as often as I used to. I switched this year to a Babalot Overdrive 105, and although the racquet specs are similar to my old Head, it plays much softer, and is easier on the elbow. Because of this, I have switched back to the NRG2 17, and I'm back in tennis heaven again. I can play 2-3 hour matches with no arm problems whatsoever. Will never play with anything besides Technifibre strings. I am a 4.0 baseliner.
From:Alan, 11/13

Comments: Great string. I have been playing for 5 years and at first I have tried a few other strings that would last 3 months and die. I get about a year out of these strings and I play 2 to 3 times a week. I have been known to hit hard at times and have never broken a set of these.
From:Bob, 11/13

Comments: I think I like this string better than gut. I have had some shoulder problems and was restringing all my racquets to gut so that I would give my arm the best possible chance to survive. Yet, I left 2 frames with NRG2 and one with BiPhase cause I was tired of stringing. After about a couple of months of hitting with the gut (Babolat Tonic and Klip) I kept coming back to the racquets with the NRG2 in them. I feel I can really take a rip at the ball and the control is just supurb. The Biphase has a little more pop but the NRG2 just feels like I can put the ball about anywhere I want and the strings seem to hold the ball even longer than the gut. And it seems a little easier on the arm than BiPhase. Although I am going to keep a close watch on how my arm feels, I'm going to string up a few more racquets with NRG2. Lastly when I'm banging the racquets off each others strings I think to myself that these guts feel so much better -- then I get on the court and it's back to the racquets with NRG2 in them. It's like the people at Technifibre said we want to make a string that feels as good as Tonic+ but deaden it just a tad like a poly so you can take a rip at it and it will land in. Still my favorite string NRG2 in almost any frame.
From:Ian, 8/13

Comments: Best string I have ever played with. I used to use 515 back in the day and this reminds me of them. I've tried many other brands and always keep coming back to these.
From:Lambert, 5/13

Comments: Great string! Excellent feel and ball pocketing, and has the pride to snap before it goes too far south in terms of playability from loss of tension. That said, it isn't the most durable string at all. But, I like that it kind of lets you know it's going to break before it breaks (fraying) without it affecting playability too much. I wish it were half the money, because I go through it pretty quickly, but it's a great string that worked well in my 18x20 BLX Blade 98 strung at 58lbs.
From:Mike, 5/13

Comments: I strung it as a cross string with BB Ace in the mains. I used it on Tuesday and I have to say it felt great. It has a cushioned feel, increased power and touch shots were working very well. I played a 2 hour singles match, followed by about 3 hours doubles over 2 days, and the string snapped within 10 minutes of hitting. It started to fray after the singles match. I'm a fairly heavy hitter with moderate spin, but as nice as it felt, I still need much better durability than 3-4 days. I now have the joy of re-stringing my racquet again. Try Isospeed Professional Classic as an alternative, as it's somewhat stiffer, but lasts a lot longer.
From:Jonathan, 12/12

Comments: Wow, do I like this stuff! Good power, good feel, good spin, good control, easyto string. I was always an MSV guy but this string plays much better and is now my newfavorite string.
From:Jethro, 8/12

Comments: Soft buttery feel but with power to spare and spin on demand. Holds tension well, even when it is fraying and looking a little rough, it remains durable and still plays great. Good control for a multi and even better on a tighter string pattern. Highly recommended. Excellent for arm issues. (Volkl PB10 @ 55)
From:Jay, 6/12

Comments: I just tried this instead of my usual Wilson NXT Tour 17. Had it strung at 60 lbs in my Wilson BLX Juice 100. It played great (feel, power, control) but frayed very badly within two weeks. The NXT usually last 6 - 8 weeks before fraying.
From:Jeff, 4/12

Comments: I have been using this NRG2 string exclusively for the past 8 years or so. I love playing with it and the durability has been pretty good until the last year or so. Now I'm going through strings in 3-4 weeks, whereas it used to be 5-6 weeks (playing 3-4x per week). I am getting fed up with the cost and bother of restringing all the time, so am now looking to find something with more durability.
From:VICTOR, 2/12

Comments: This is a very good string in a full bed or in the mains with another string in cross like Wilson NXT 16. I have strung it at 51 lbs in my Head Youtek Extreme MP and I got great feeling, power, comfort and spin. The NRG2 is crisp but it offers also a good ball pocketing. Not too soft and not too stiff. Just perfect balance and it keeps very well the tension as multifilament string. It will last on my open pattern 16 x 19 for maximum of 8 hours but there is a compromise for quality, it is the price. I invite you to check the learning center of Tennis Warehouse on data comparison of string and you will learn a lot about different string.
From:Gilles, 11/11

Comments: I like this string as a hybrid with it in the crosses and Gamma Live Wire 17 gauge in the mains. What a feeling, like gut all the way around. String it 2 lbs more to keep the tension, you will be surprised the combo of this set up.
From:Patty, 9/11

Comments: I can describe this string in one word: wow. I have some tennis elbow and I barely feel any stress or pain in my joints now. The strings have a nice pop to it, really good with spin, and has loads of feel. If you like synthetic, try this. If you like natural gut, try this. If you like to hybrid with poly, try this. There's a reason why these strings were named best strings in 1999, hats off.
From:Rohit, 8/11

Comments: I've been hooked on this string for nearly two years and am reluctant to try anything else. The combination of power, comfort, and control is worth the trade-of in durability. I'm a 4.0 and play about 8 hours a week and these strings will start to fray after about two weeks. At 60 lbs. tension, these strings offer the perfect combination of pop and spin in my Dunlop 200 g XL. If you want better longevity, I suggest the 16g, but there's a surprising trade-off in feel and responsiveness. For some reason the 16 at the same tension just doesn't feel as lively.
From:Hugh, 8/11

Comments: I have tried quite a few strings in the last couple months and this is my favorite string ever! I started with a couple different 17ga. poly strings. I was getting a ton of spin but my shoulder started getting sore. After reading posts on a zillion different strings I had this put in my Volkl Power Bridge 9 @ 54 lbs. I am getting at least as much spin, the feel is perfectly crisp with little to no vibration. It has the right amount of power and my shoulder has completely stopped hurting. What else can I say.
From:CJ. 5/11

Comments: Really like this string (17g NRG2). I still play with 2 Head Prestige Classics (93 sq inch headsize) and have one strung with X-One Biphase 17g and one with NRG2 - both strung @48 lbs. I like the way both play - and to my mind they both play pretty similarly - though if pressed, I'd say that the racquet strung with X-One Biphase may be just a smidge more lively. Hard to say really - as the small difference could be due to the frames as they are the same racquet but not "matched" and one is a year or 2 older than the other. In any event, when I re-string I may switch the string in the 2 frames in order to try to isolate the very slight difference in the way the 2 racquets play.
From:Anon. 4/11

Comments: This is my string of choice. I fell in love at first hit. If you prefer multifilament strings (as I do) it really doesn't get any better than this. I must say if comfort is your number one goal then maybe X-1 biphase is a better choice, That being said I string tight and like some pop from the string bed and this string gives my the blend of comfort and pop without the mushy feeling of Biphase or stiffer feeling of Klips excelerator, Both are great strings but not what I was looking for. Durability is average for a multi but the playability more than makes up for it. You really can't go wrong with this string if you're looking for any of the properties mentioned. 5 star A+++ stings Becker Delta Core Legend @62lbs
From:Dallas, Sonoma, CA, USA, 02/11

Comments: I use this string on a Babolat Z 110 racquet. As I am in my 60's and have had wrist surgery this is a great combo to reduce vibration. I play 4.0 tennis and still generate reasonable pace but have found that this combo helps me to hit hard with less effort. This string will impart energy to the ball with excellent spin. If you are still just banging the ball you may not like this string, but if you have found success with finesse and can't afford natural gut this is your string. It is exceptional.NRG 17 strung at 53 lb.
From:Chuck, Tucson, AZ, USA, 11/10

Comments: Used it in combination with Tecnifibre Spinfire on Babolat Pure Storm and later on the Aero Storm for about 7 years. Unbelievable feel and pin-point control, easy on the arm. Problem is, it loses tension after 4-5 hours of play and it frays quickly. I have just recently switched frames and found that this string is a bad match for Yonex RQIS Tour frame so I stopped using the string. If the constant restringing doesn't break your bank then this string is definitely the closest you could get to the natural gut feel.
From:Adi, New York, NY, USA, 09/10

Comments: Great string! I hybrid this with the MSV poly 17g @ 50lbs on the main and the NRG 17g cross at 54 lbs on my Fischer Progressor. Feel is great and it pockets the ball really well. The control of the shots and feel are great as well. Try the NRG and you'll like it!!
From:Anon. 12/09

Comments: This is the best string I've used to date (and I've gone through plenty). The string has great feel and pop. It does have the tendency to fray but it's not that big of a problem. I string my Babolat Pure Drive GT with it at 62 lbs and it seems to last a decent length. Going to try and use it as a hybrid to see if I can get a cheaper string set up cause I don't want to pass up this string.
From:Neil, San Antonio, TX, USA. 11/09

Comments: Great string for the price. Feels like natural gut w/o taking a loan out. For players that does their own stringing, this is the best string for the money PERIOD!!! The one drawback is that it loses it's tension quickly (after playing 4-5 matches). You will love the feel after a string job.
From:Ben, Buffalo, NY USA 08/09

Comments: I ordered a bunch of different strings at the beginning of the year just to see what I'm most comfortable with. After trying out the T.F. NRG2 17, this is definitely my fav string and soon I'm going to purchase a reel.
From:Mike, Toronto, Canada 08/09

Comments: This string has great feel and pop. I think that my mistake was to use it in a hybrid with polyester strings. I can usually get a couple of months out of a set of strings and I've only been able to get about 6 sets of play out of this stuff. Even though the durability is lacking in my opinion the feel is fabulous.
From:Paul, UT, US 07/09
String and Tension: Tecnifibre T-Fight 320 VO2 Max strung in a hybrid with Pro Red Code 16 in the mains at 58 and NRG2 17 in the crosses at 61

Comments: This is by far the best string I have ever used. I used to be a big believer in Wilson but decided to string this in my Prince Rebel 95 and it was the best decision I have ever made. This string provides great spin and you can really wail the ball. It has a lot of pop and is very soft. A++++++ from me.
From:Brandon, East Lansing, MI, USA. 3/09

Comments: I thought the string held tension well and durability was fine at least for me. Lasts less than a month, which is lower than some polys like Unique Big Hitter. String wasn't too soft or firm. It will start to fray but it held up well. Worth trying out.
From:Lk. 1/09

Comments: I'm a believer! What a great string! I have been using Prince Synthetic Gut Duraflex 16 for years. I recently purchased a new racquet with Tecnifibre NGR2 17 in it. I bumped up the tension 2 lbs, and wow! I can't believe how this string feels. I used it for 1 hour on a ball machine to break it in, and then played a 1.5 hour singles match. Tension has stabilized and shows no sign of dropping further. Spin is fantastic, and is a bit more powerful than the Prince Synthetic Gut. The power is deceiving because of the increase in spin, thus keeping the (heavier) ball in play. Durability has yet to be determined. After 2.5 hours of play, they show no signs of threading or biting. The string is much more comfortable now that it is broken in. It's not as soft as the Prince string, but gives better feedback. I will be looking forward to getting a reel and making a permanent change in the next few weeks.
From:Ned, Vienna, VA, USA. 1/08

Comments: Great String if you are not a string breaker. I broke this string in 4 days on my Dunlop M-Fil 300. However the playability was great. I am now going to try to see if I get better durability from the 16 gauge version. I string my racquets at 62 pounds and I play NCAA Division 3 Tennis in college.
From:Danny, CA, USA. 7/07

Comments: Great string to use on the Tecnifibre t-fight 325 with the tight string pattern. Very good ball control, spin, pace, and the strings feel very solid strung around 60 lbs. The only downside is they break quick. I'm only 14 but serve around 100 and use moderate topspin but they still broke in nearly one month.
From:Nicholas, FL, USA, 03/07

Comments: Had these strings strung on 60 Lbs tension. Was very powerful and generated quite a descent amount of spin. Has not lost tension yet and it's been about 4 hours. Shows signs of breakage but held up pretty well. A little bit too powerful for me so I'll try the new Gamma Asterix stings. Would recommend for power however.
From:Terry Kuo, NJ, USA. 3/07

Comments: Very good string! Good feel, it's soft but not too soft to where strong flat groundstrokes or strong volleys do not have some pop to them. Strung in a Dunlop M-Fil 200 @ 61lbs. I've only played with them a few times, 2-3 hours each time, but so far not a very noticeable amount of tension loss and no fraying yet, which is good for me.
From:Trey, Augusta, GA, USA, 02/07

Comments: Great string. Plays very similarly to gut. Incredible feel in a Babolat PD Roddick. Generates lots of spin. Very comfortable on the arm. I'm going to try a hybrid with ALU Power 16L or Babolat Pro Hurricane Tour.
From:Jerod, Washington, DC, USA 09/06

Comments: The NRG2 is an amazing string hands down! NRG2 gave me a ton of spin and great control when hitting. Another plus is that these strings pocket really well. The bad news is that I will be using polyester strings again for their longer life span.
From:Eric, Los Angeles, CA, USA 07/06

Comments: I put it on Babolat Aeropro Control @ 60lbs. Wow I'm very impressed, it feels great on your arm, generates power, control and spin. Durability benefits and Affordable price.
From:Reynaldo, Philadelphia, PA, USA. 1/06

Comments: This would be a very good string if it held tension more consistently. Initially it offers fantastic power, feel, and touch, but about a week later it becomes unplayable due to enormous tension loss. This might be a good string of choice for 3.0 or below. Other than that, I really can't recommend this string. I'll try the X-One Biphase.
From:Fred, USA. 9/05

Comments: I am number one in the country in boys 12's and I love this string. It has unmatched feel except vs gut which is too much too pay for. It does fray, if you hit top though.
From:Jack, Lincoln, NE

Comments: Very good string, but yes it does fray and break really quick, I strung it oh my Dunlop 200g XL and it had very good spin and control but it frayed probably 1 week after playing, which would be maybe my 3rd day of playing with it. So if you are a heavy top spinner I would not recommend it, with all that said I ordered another set of these strings I just love the control and feel!
From:Moses, Modesto, CA, USA

Comments: Plays like gut but there wasn't enough comfort for me here. Great string if you want a string that's similar to gut.
From: Dave, Boise, ID, USA. 05/05

Comments: I currently use the NRG2 17 on my Dunlop 300G at 55lbs. It's been a good string overall but nothing extraordinary. I guess my expectations were very high given all of the praise I've read on this board. I last used a Tecnifibre string many years ago and it looks like they've improved the fraying problem. On my other 300G, I use Ashaway's Vantage Pro 17 which compares quite nicely in terms of power and feel. Also, the Vantage Pro 17 is a bit less expensive.
From: Gil, Burbank, CA, USA. 12/03

Comments: This is a great string. A solid combination of power, feel, and durability makes this my string of choice. I'm an all-court 5.0 player who strings his i.Prestige at 56 lbs.
From: Damion, Los Angeles, CA, USA. 10/03

Comments: This is a great string that offers a great balance of feel and durability. This is now my string of choice after it has outlasted my other favorite multifilament (Babolat X-Cel premium 17).
From: Damion, Los Angeles, CA, 10/03

Comments:I've used Tecnifibre NRG2 17 and found it to have very good playability, endurance and overall performance. It is an excellent choice for those players who demand good performance. I found it a better choice that Wilson Sensation or NXT. I also like some of the Gamma strings. It seems that I'm always searching for that perfect string. I was considering making this Tecnifibre the string that I would settle down with and use. However, I stumbled on another string that is without doubt the best I've ever experienced. I have found my string, it's called Babolat Powergy 16. It is amazing! I'm an all-court player. I've been playing tennis about 15 years. I play two or three times a week and use the Head Intelligence i Prestige mid.
From: Stephan, Greenville, SC, USA. 9/03

Comments: I have to admit that this string gives a ton of power. However the power doesn't last very long. It also frays and gets all fuzzy. I would recommend the 16 instead.
From: Curtis, Sugar Land, TX, USA. 6/03

Comments: I have been using Tecnifibre NRG2 SPL 17g string in my Pro Kennex 5G racquets for the last 2 years. I find that it plays best after it breaks in and begins to fuzz or fray. You have to hit the shine off the strings! It seems that the feel and spin quality improves with use. Of course when it's at it's peak you break a string. The feel is closer to gut than anything else I've used, but if you can afford it there is nothing like gut. I'm a 4.0 senior player that plays 3 to 5 times a week.
From: Frank, Cleveland, OH. USA 12/02

Comments: This is an ok string if you are not a chronic string breaker. It lasted about 1.5 weeks in my Wilson Pro Staff 6.0 Original. I did like it in the first 2 days but then it began fraying uncontrollably. I like to serve and volley, but when I am just practicing I hit with heavy topspin. I am a 4.5 all court player, and would say if you can afford it all the time go for it.
From: Alex, Cleveland, OH. USA 11/02

Comments: I do NOT like this string at all - too stiff and not the control that I expected, poor durability even with string savers which then make it even less responsive. I am a 4.5 all-court player.
From: Jennifer, Trinidad, CA, USA 7/01

Comments: This string is probably the best synthetic gut on the market. It provides good control, spin, and feel. It also offers better durability then Wilson Sensation NXT 16 or 17 gauges. The strings work best on midsize/plus racquets the best.
From: KJ, Seattle, WA. USA 4/01

Comments: I have used Wilson Sensation NXT 17 for about one year and been reasonably satisfied but as the string ages the control drops off. After reading that Tecnifibre NRG2 SPL 17g was a real good feeling string but questionable on durability I tried a hybrid of Wilson NXT 17 on the mains strung at 64 and Tecnifibre SPL17 on the cross strings strung at 62. My Head Radical came to life, on ground strokes I could swing out and keep the ball deep but in the court, on serves and volleys the control and pace both increased. Overall I am very pleased with this string mix.
From: Charles, Mendon, MA. USA 4/01

Comments: Tecnifibre NRG2 SPL17 is one of the best playing synthetic guts available on the market. NRG2 offers great feel, control, and spin. Seems to offer a little better than average durability compared to other synthetics. Very easy to string with lubricated coating. This string is definitely the next best thing to natural gut.
From: Charlie, NYC. USA 12/00
Racquet type: Head Ti Radical
Playing level: NTRP 5.0 all-courter

Comments:ProKennex gave me four sets of Tecnifibre NRG2 SPL 17 String after I returned my two defective ProKennex 5G racquets for replacement. As a test, I strung one racquet with Prince Soft Synthetic (17 gauge) and the other with the NRG2 17 gauge, both at 60 pounds. Initially, they both played well (and similarly), but in less than 2 weeks, the NRG faded--it lost control (crispness). After 6 weeks, the NRG2 was not playing well at all. I play at the 3.5-4.0 level.
From: Mike, Richland, Wa. USA 11/00
TW note: Tecnifibre NRG2 SPL 17 is a multifilament constructed string. Multifilament fibers do tend to break down sooner than regular synthetic guts with a solid inner core (such as Prince Synthetic Soft 17g.), affecting string "feel" and elasticity. As is often the case however, a multifilament string like NRG2 SPL 17 will, in most cases, give a much better level of playability in the first few weeks. Nothing new here - playability vs. better durability.

Comments:I used Tecnifibre NRG2 SPL 17 String on a Longbody Prince ThunderStick, strung at 63 pounds. Had a great feel in the beginning, and an even greater feel after it was broken in. Great spin, power, and sensitivity. Breakage occurred after 3 weeks, fraying after the first couple of days. Definitely worth the money if you can afford it.
From: Tammy, USA 10/00

Comments:I tried Tecnifibre NRG2 SPL 17 String recently. When I first began hitting (with my Head Radical Ti) I thought it was the best string in the world. It felt like natural gut and gave the feeling of cupping the ball and then catapulting it toward the target. I was so impressed I ordered a few more sets. The shine soon faded, however, and in a few more hours of playing time, I felt the string was soft and mushy. The great playability that was so impressive initially vanished. I cut the strings out and went back to my old lover--Gamma TNT Pro Plus 17L--and have promised myself I'll never change again.
From: Randall, Binghamton, NY. USA 3/00