I got the Wii Fit board and game as a Christmas gift last year. The concept is great! I love that the game tracks your weight and balance. It makes it easy to stay motivated when you can see your progress on a graph. Also cute is what the game does to your Mii. It matches the appearance of your Mii to the weight and height measurements. As you lose weight, so does your Mii....another reason to stay motivated. 

The more you work out, the more games you open up. Work out time is logged in a piggy bank that keeps track of your minutes every day. You can go back and see a report on where you are...