I had my prostaff for 3 months now. Strung with Cyberflash @ 55ibs I love the cosmetics, it's more simpler than the previous one. When I got on court. I still got that same plow through from the previous one. However, there's a slight difference. The racket has crisp feel to it; similar to the K factor version. It's like having the k factor and blx one all in one. Now, i totally like it.