This is a small download but really not worth the effort ... I suggest giving it a miss ... it has to be one of the worst fitness titles I have looked at yet! ... motion recognition is so appallingly bad it is ridiculous! The game avatar does not follow your movements in any way at all! As long as the wii remote and nunchuck are in any kind of motion the avatar just loops through the exercise motion ... not in sync or in any way reflection your actual motion!
My pick of the bunch in current fitness titles in order of preference is
My Fitness Coach: Cardio Workout (Great Box-a-size workout ... Box-a-size elements in other fitness titles are total crap in comparison)
EA Sports Active: More Workouts
Wii Fit Plus
Two other titles that seem to have decent reviews but that I haven't had a look at yet are
NewU Fitness First Personal Trainer
The Biggest Loser