The string lives up to its spin promises. It really "bites" into the ball, even leaving black marks on it where it chomped down. But there are counterpoints to make:
1. The edges on the string wear off quickly, so the spin potential doesn't last all that long. Fine if you always string fresh, but your performance will deteriorate over time.
2. I found it to lack feel when strung in both dimensions (I use the Lendl pattern, to soften the shock when hitting at the edge of the stringbed, but the sweet spot is strung with one string in both dimensions).
3. Those that expect the mains to dance around like Wilson pushes with their spin-effect racquets should look elsewhere. This string is so grippy that even threading the cross-strings is a challenge when stringing it as a hybrid. The mains are stuck where they are, and nothing will move them.
Bottom line, if you want that bite that an edgy string can provide, this can do it, but I would do it as a hybrid, to retain some feel, and don't expect "sp
Love these strings, they have very soft feel and strangely feel a bit "wet". I used couple of soft poly strings and these seem to provide best power, control, and obviously the spin. As for their durability, they seem on par with other poly strings, if you're a hard hitter don't expect these to last all that long, not necessarily because you might break them, but because as all polys, these strings will go dead after good 10 hours of play.
I like the way the strings feel. Had been using rpm blast , these spin the ball better. Have better control of my serve.