The more I play my wii fit, the more I like it. I am unlocking more games, working on my balance (which is dismally bad) and working out. I like that it tracks my weight- It keeps me more accountable than I thought it would. I actually consider what I am eating, thinking "well, I haven't done my body test today... so, maybe a pass on the cheese" I'm still just a week in, but I can already feel it working, and the soreness from the boxing that I've been doing, i can totally feel in my arms.
plus, it's hella fun, and I love to introduce it to people.