Wii Fitness?

As was mentioned in my last post, my family is the proud owner of a Wii and the Wii Fitness game. They have enjoyed using the system to supplement their other daily activities. But how effective is the Wii at providing a complete workout? According to Brittany and the Dallas news, it seems to lack in any real benefit. However, in my experience it makes people more excited to work out and how can that be a bad thing. Obviously there are harder workouts, but if people are willing to do Wii fitness and not other workouts than this is a good workout for them and it is better than playing any other video game.