Rant away, thats the idea of a forum, to help each other.
Now, again i may cause conflict, but i was using the wii fit daily. i have mobility issues so need to regulate what i do exercise wise. (cant jog, cant get on a push bike, etc), so the wii seemed perfect. But i got a bit fed up with doing all that and seemingly losing little, so i just said sod it and stopped. i have not had any slow down because of it, in fact i think my losses have been greater. Dont get me wrong, im not saying its due to the stopping of the exercise, but it hasnt been a major issue to me personally. My advice would be to stop and see how you go for a week. Of course you have to weigh that up against gym fees if you are tied into a contract, but nothing in this world says you have to do what others do.