A fun, innovative way to START a fitness program or SUPPLEMENT a program you are already on.
The biggest problem I had with Wii Fit came right off the bat, when it did it's initial body measurements of me. I'm a 27 year old personal trainer and professional wrestler who works out 6 days per week, eats healthy, and overall is in very good shape. Because the Wii Fit calculates BMI instead of body fat percentage, there is now way for it to truly get a good reading on your fitness level. BMI is based on age, height, and weight only. Someone like myself who has a good amount of muscle mass, when measured by BMI, will be overweight to obese. I'm far from both, but the Wii Fit doesn't know the difference because all it registers is my weight compared to height. All in all this isn't something to take too serious, but I see it from a developing standpoint as a major oversight, and one that should be worked on in future gaming fitness attempts.
Once you get past the initial body measurements, the game is very fun. The exercises, which focus very much on balaance, are challenging, and will assist you in developing more strength, tone, and balance. Just don't expect to become super fit with just Wii Fit, because you are limited to 15 exercises per category. This program is however a great way to supplement a workout routine, because it will help you improve your abilities, especially in the balance department.
All in all Wii Fit is a worthy first attempt at a new idea in the world of gaming, and one that everyone should at least try. If you are someone looking for a fun way to get into exercising, then Wii Fit could be a great tool for you to start down a path to good fitness. Just don't rely on it as you're only method, or you will be dissapointed.