Combining the appeal of a cheap exercise title, with some recognizeable songs, this title has quite a broad appeal.
It's certainly easy to use, and the mechanics are rather generous when it comes to deciding how accurately you are copying the dance moves. As with singing and instrument games, there will be plenty of songs you don't like, but enough you do to keep you busy.
If you play it long enough you can certainly work up a sweat, although it won't have the longevity of Wii Fit or Sports.