It's fun, yes, but everyone should know that it is clearly impossible to make the motion control work with your whole body. I mean you actually don't need to move your body at all. If you move solely your wrist you can already succeed in this game. And I dare to claim that Ubisoft didn't care about the control, I think there is no real concept behind it. I was the only one at Game City in Vienna who was not embarrassed to dance like the figures on the screen and I got last after dancing with little girls (my self-confidence is now somewhere hell. Very low ;_;).
But oh well, it seems to be enough reason to bash the Wii.