I may have mentioned this in another thread, but I did buy this for a family member. She uses it infrequently, but that's no surprise to me. What I will say in it's defense is that it is VERY well done for what it is. Based on some basic excercise based tests, lifestyle questions, etc. it creates a daily, interactive workout complete with in depth tutorials about the excercises. It tracks your progress, and is adjustable to your goals and even equipment owned. Basically, it does what it sets out to do better than almost any console niche software I've seen. It's basically unique in that and in it's genre...which is (I guess) finding further applications for what has become in many homes an indispensable piece of tv related hardware.
Damn it for being a shitty game (something it really isn't), but judged on it's own merits it's made quite well. Better than most games, for that matter. Perhaps that aim doesn't meet with wide approval but I don't understand the outright hatred.