My wife has been on weight watchers for a year and has lost 35 pounds. She got the Biggest Loser Challenge for the Wii in December. I started doing the workouts at a low intensity level. I could tell I was getting in better shape, but I wasn't losing weight. I hadn't really done any exercise since I ran track in high school. I had the gradual weigh creep since then. I was up to 216 pounds at 6'0". Then in January, I started tracking calories on the Biggest Loser game and that made all the difference. I cut out soda and just started becoming more aware of portion size. I measure out servings and always try to plan ahead before eating out. That has been the biggest thing. I usually make bad choices, if I don't know the calories ahead of time. So in three months of tracking calories and moving to the the 2nd hardest intensity level in the game (1/2 hour, 4 times a week), I've lost 24 pounds. I've got another 10-15 to get back to my high school weight. The game does a good job of mixing up the workouts between cardio, yoga, box fit, and resistence.