We got the WII and bought the sports mix. My brother has the olympics. Both are very good fun and brings the family/friends together. I played the tennis game and worked up a sweat because I really got into it. However, you can still be a coach potato and play it but I don't think it is as fun.

As games go, I like it for the fact that it has games that every one can join in either by playing it or the entertainment factor of watching someone play.