My Fitness Coach is an interactive "game" for the Wii. The coach is Maya and you have to do an assessment, (I still can't do the star jumps!) and measure yourself. Then "she" asks what your main focus is, and you put weightloss and she works out a programme for you. You never get the same workout twice, so it's not like a dvd, tho the exercises are a bit repetitive and I march on the spot rather than do the turn step,. But you can overide the cardio bit and do yoga, pilates, exs for upper body, core or lower body. and she'll tell you off if you don't turn up for one of your sessions!
It's not perfect, but you work harder than the wiifit and for a tenner from amazon you get your money back pretty quickly. It explains it better than I can too.