I have Biggest Loser though I don't use it much. It's definitely more of a workout than Wii Fit and should help. Any exercise is good
I mix-up EA Sports workouts, treadmill and stationary bike in the winter, oh and Walk Away the Pounds last year. It definitely helps with weight loss.
Baby steps, losing the holiday excess first.
Maintaining 48 lb loss since 2008, working off regain to a sensible maintenance level. 60+ lbs and counting!