Rather than a game, Wii Fit is more comparable to an exercise program. More specifically, it's something that most people would consider playing in short bursts each day. A recent poll, however, shows that close to two-thirds of Japanese gamers are already giving up on the product. ITMedia in Japan took poll data from 1000 gamers and a staggering 64% of the participants said they stopped using Wii Fit after purchase.
See the link for the full poll results.