First off, the technology itself just makes somebody excited. Seeing yourself on the screen and playing games with your body can't be beat.
It is a wonderful party game and anyone can just pick it up and play and enjoy every minute of it.
However, as a single player game, it can get old pretty quick--especially is you don't like the 12 games it has to offer. The graphics aren't too spectacular, but they do their job just fine.
This has a lot of potential in the future, but for now it's just plain fun.