I got mine today and synced it all up. The Wii board feels very strudy and solid. I thought there might be a problem on the carpet but it was fine. I'm guessing if you have really deep carpet you may have soem trouble.
You get yourself set up and can do lots of things. You can set yourself goals on weight loss if you want. You can even hide all your details from other users, so all you weight conscious ladies out there your other half won't see any details. I've yet to try it out fully but from quickly using it I think it is going to be great. The board feels safe and the games, training games look fun.
So if you want to look after yourself while having fun this is the game for you. Even if its just 5 minutes a day the game will track this and hopefully you will reach your goals!
Nintendo have produced yet another ingenious product!