I lurve my Wii Fit! Even if I do suck at the balance games. But it's tricking me into exercising by making it a game, and that's all to the good.
The yoga instructor-avatar cracked me the hell up when I was doing one of the poses that doesn't use the balance board (and hence can't tell how well you're actually doing) and she said, "Your form is quite impressive!" and I said, "How the hell would you know, lady who can't see out of the TV?"