Its pretty cool, but its not really my thing (I was never into Wii, either, for the record). If I'm going to do vidio games, I'll do that. If I'm going to be active, I'll do that.
Technicly, its pretty slick. Its sensitive enough that you can't do it with a baby in your arms, which is rough, since it makes your shape all funny. Though it didn't pick up my son when I finaly put him down, so if you're under 2'8" or so, its not for you. The interface is nice, and easy to use, and its intuitive and simple enough that my mom (who's technology level is largely frozen at the abacus) was able to pick it up. So its a good product. But its not to my taste.