I agree with Blaine Parker. On it's freeware incarnation KTA Tennis was zippy enough to become a very enjoyable, addictive game. Ever since v.1.0 the game has gotten better on the looks and feature department but it has become unplayable when it comes to performance. This is not Doom 3 or Halo...it should play A LOT smoother even without a top-of-the-line machine. From v.1.01 to v.1.02 it did get a tiny bit smoother but not nearly enough to get it to be playable. I really hope this improves as now it is not freeware anymore.