ok finally got to play with this new and the latest creation from Kirschbaum. From what i am being told, it is in response to some people not getting as much spin as they like from the Proline 2 string which is a excellent string in itself. Also i suppose they had to come out with something new since there is so much Hype over the Babolat RPM blast. USTA 4.5-5.0 player, mostly play doubles now, body breaking down from too many years of tennis. Helix strung at 62lbs. Got to play League match doubles and some practice singles afterwards. played about 2 and 1/2 hours of hard hitting. Was using Yonex RQIS tour-2 racket. will scale of 1 to 5 for the review. 5 being best. 1. Groundstrokes -- I was hitting full speed today, didn't hold back on most shots. String had excellent Control, better than Proline 2 in fact. and little better than Pro Hurr tour even. I could take full cuts at the ball and keep the ball in play and deep once i got used to the string feel. Feel was bit Muted but had good feedback-- could feel the ball on the strings for a long time - really came in handy on Topspin lobs. 4 out of 5 2. Spin potential -- Definite improvement over Proline2. Much better spin. I imagine even better spin at lower tensions. Strung fairly high today at 62 lbs since i was playing a live match and i wanted good control with the new string. 5 out of 5 3. Power --- Little Muted but Lively. Little less power than Proline2 but not by much. This string would be perfect for people who felt Proline 2 was little too powerful. 3.5 out of 5 4. Volleys -- Pleasent surprise,, very nice control and touch on the volleys. I could stick the volleys with good power but still had good control. could place the volleys within 1-2 inches of lines with ease. 4 out of 5 5. Serves -- Mixed feeling on this. Plenty of power to be had but at times i had some control issues. I didnt' have a good serving day so i hate to blame the string. It was more me than the string. but when i did time the serve well, i was able to generate some nice spin,,, Both topspin and Severe Slice serves out wide. 4 out of 5 I will add some more later.