As long as it's streamlined a lot better than Wii Fit. I don't want to have to sit through the same messages each day before I enter my data. Also, on Wii Fit, if you missed entering your activities for a day, you couldn't go back and do it the next day.
This game would have to show me a lot before I would actually buy it. I still use Wii Fit every day, but only to weigh myself.