It is a good program to use, but it is pretty intense on the knees, using a lot of squat-type exercises during the 30-day challenge. The "sequel" - EA Sports Active More Workouts - doesn't seem to rely so heavily on the knee-crunching for its 45-day challenge. I use the More Workouts version almost all the time now. I just recommend trusting the program to go all the way through the 30-day challenge in the old program first, before you try making very many advanced changes to the workout order.
Of course, what works for some won't work for all. If you do like using it, you may also want to buy your own resistance tube, instead of the latex "band" that's included with the EA game. I think you'll find it easier to control, and you can usually find them in any sports store or walmart-type store under $10.
The only other negative I've heard about the EA program is how the leg strap doesn't always give good readings. Depending on the size of your leg, you may need to wear it higher or lower than where the game shows you should have it.
-- David --
Leader of the Bowling Green and South Central Kentucky SparkTeam (http://teams.sparkpeople.com/bgky)
If you'd like to add my Mii "DPTHEIS" to your Wii game, you can find me at address 3503-3021-9392-9937.