To be honest, I didnt really think I'd like this game. I only got it because it was on offer when I bought my Wii console. Let me tell you though, it is one of the most fun games I've ever played! So glad I got it.
Not only is it tremendous fun, either on your own or in a group, if you made a resolution to play this for half an hour a day, you'd be well on your way to getting fit.