Alison Sweeney says this about the Wii Fit:
"It's just a good example of how you can really get it done at home," she says. "You don't need to have a big fancy gym membership. One of the things we talk about on The Biggest Loser all the time is just how difficult it is financially to lose weight sometimes. And that isn't an excuse anymore. There are really reasonable options."I still don't think a Wii is the most economical exercise.
Here is the breakdown
EA SPORTS™ Active game is $59.99
EA SPORTS™ Active Accessory Pack $19.99
Wii system base price $249.99
In my opinion walking and calstenics are still the cheapest exercises.