Comments: I have played with both multis and monos and perfer the feel of multifiloment strings. In fact, I do like natural gut in the mains with a nylon or syn. gut in the crosses. I am a serior sectional ranked level player and have a traditional playing style. I tried ZX (red) with X1 Biphase (red) in the crosses. This turned out to be a very good combo. The string plays well in regard to having sufficient power and provides excelent feel i.e. good spin and touch. I am somewhat amazed at the durability of the string as a mono does not fray nor has really have I seen any notches. I do think to build a better feel and softer playability one should string down about 12-15% on the mains and however you like the crosses.
From: Anon, 4/13

Comments: This string is not for a player that can not attack the ball in an aggressive manner. A quality multifilament would serve a 4.0 player much better. Ashaway is a good company and has a solid line of strings, but this Zyex string does not compare favorably to a Luxilon poly or any high end multi. Perhaps it does not cause any arm pain and it probably won't break for a month.
From: Mark, 2/13

Comments: Using this string for an elite junior recovering from elbow injury. Went to this after averaging 3 hours per set of Babolat or Klip natural gut. This lasts 5 times as long and is nearly as soft as natural. Plays a lot like Wilson NXT and Tecnifibre BiPhase, but far more durable. If looking for a soft string, be sure you get the Zyex Monogut, rather than regular Monogut. Unless you are willing to insert string savers in natural gut, this has by far the best combination of durability and comfort.
From: G.T.M., 1/13