I think it's a great idea. The thought of entering a gym fills me with horror but I wouldn't mind working out at home using this. It'd be cheaper than an annual membership and would get used more anyway probably. Release date is this coming Monday.
The idea of working out at home is surely juicey, but for me gym is a better option.The reason is one that you just need to go there and use the things you want to,every other arrangement has to be taken care of the attendents there.
My friend has this and absolutely loves it. If you are a gamer it is like having the best of both worlds. I've been playing Guitar Hero lately and that really gives your arms a good workout too, especially when you get on the medium levels.