he said that it's for "advanced" players. however, i like it. it plays a lot more flexible than my prostaff classic 6.1 and the feel is just so good when i know where the ball is going when i hit it. anyways... i noticed that my wrist sometimes hurts after playing for awhile but if i stop playing for a couple hours it stops hurting. is this normal or am i doing something wrong? i open my wrist for better top spin so could that be it?