I have the move. And this game is very, very good. I have played table tennis competitively. I have played ping pong on the Wii as well.
Nothing previously simulated compares to this. The timing is very realistic. The 1-to-1 controller action is perfect in this game. The smashes, spins, and ball control is incredible, and I can play and control the ball with the same kind of movements that I would in a real game.
I've seen others play, and have difficulty. Mostly because they are swinging in such a way that would yield the same results in real life. Because your exact wrist movements are tracked, it's not enough to simply swing at the right time. You must swing as you would in a real game with the angle correct.
It also helps to ensure that you are standing far enough back to have enough space to work.