Won't lose you that 20 pounds, but it will sure help.
Most people always want to lose a little bit of weight and is probably the main motivator for buying the Wii Fit. The best way to describe how the Wii Fit does this is to say it is like a personal trainer and tracker. You set a goal with it, mine is to lose 22 pounds in 3 months. It keeps track of it and lets you know how you are doing.
The Wii Fit gives me a reason to get on and actually do different exercises. Not only is working out a lot funner with the Wii Fit, but it has a good range of different activities to do so you don't become really bored. Anyone who has a Nintendo DS and Brain Age will understand what I mean. You want to log in everyday and do the few exercises it has.
You won't lose tons of weight from this alone, but now that I have Wii Fit and a plan in place and a sort of daily routine, I'm now setting to go jogging everyday again with my dog. The Wii Fit also lets you input activities you do, like my jogging, so you can keep track of that also.
I recommend this game to anyone who needs that push to exercise or is looking for more ways to lose weight.