Prince describes this string as a "solid core multifilament". It doesn't play like a soft poly at all, because it's a lot softer and more powerfull. In fact it's soft and powerfull like a multi (maybe because it is a multi), so if your regular string is a multi, don't drop the tension 10%. Because the string slips back after every shot, it does give you a bit of a poly-like spin. It basically combines the power and softness of a multi with some of the spin of a poly, which in my book makes it the best multi that I have ever played with.
Honestly, I liked the string a lot but I hated the price, plus it would be nice if it was available in 17g.
Did I mentioned that it doesn't move at all?