I'm on the fence with this one. I have the Wii fit and bought it specifically for after my surgery. I didn't find it very helpful with losing, but it does have yoga and good balancing excercises. However..there are other games like Zumba that can get you moving and I enjoy those much more!
I love mine. I use it to weigh myself weekly. It tracks my BMI and my weight. It does have yoga, but it also has alot of games that can burn some calories! I definitely use mine.