The game is technically great, but you just don't get that feeling you did while playing the original N64 version.
The graphics are good, probably one of the best parts of the game, and the sound is good as well. But the gameplay, it just feels, well, different in a weird way. After playing the orignal several times, you'd understand.
The multiplayer is fun, but one thing I don't understand is why the tournament mode is only single player? It would be awesome on multiplayer!
Overall, Mario Power Tennis fails to accompany the greatness of the original, but it still is a solid game, and if you've never played the N64 one, you'll probably love it. It is worth playing, and some new features are good. Even though you can turn off the power shots, it still just dosen't have the addiction the first had. It's strange but true. Definitely worth the play, but not to the comparison of the first.