Strung these up at 54 in my i.radical os. I serve and volley a lot, sw forehand, eastern backhand. One hour of practice and then played usta match (two sets) on har-tru: From the baseline, huge opportunity for spin. My first fh passing shots had so much spin that they landed about 2-3 feet too close to the net. The strings have a nice play feel and after I got used to them, they were fairly precise. Volleying was just beautiful...the ball seems to sit on the stringbed forever and its easy to cup the ball. Kick serves were big...I put a couple of balls head high. Flat serves lacked a little power. Ditto on overhead but certainly enough power to end play. I think the combination of a powerful racquet and the dampening action of the strings made for a nice combination. None of the harsh vibrations I felt with lux, no wrist tenderness afterwards. Overall, I loved the string. If its durable and plays like this for another 12 sets, I'll be hooked.