Have to give this info : My brother is a good player with an explosive smash using mp66. After all his mp66 is broken, he switched to low end armortecs and also pro ace racquets . But all those other racquets could not give him that explosive mp66 smash. Since ti10 is a great racquet to me and hoping that he got back that explosive smash, I gave him a ti10 as a present. But after a week using it, he decided to give it back to me because he was uncomfortable with it and losing games. I also observed that the explosive mp66 smash is still not there. The only explanation that I can figure out is that, it is because the mp66 is flexible and ti10 is stiff while both being headlights. So it seems that the ti10 does pose problems for some strong smashers after all.