my girlfriend uses it. It's good stuff IF you can put up with the absurd douchery of the host, the repetitiveness of the videos, and you're willing to stick with it. And when I say absurd, there's no joke or punch line to that. The dude is awful.
Ah doesn't bother me much, I'm doing the excercises to get in shape not be entertained by the host, the old man is buff as hell and demonstrates the proper way to do things so it works for me.