Heather, I started with Totally Cool Step and got it after a couple of times. It's a lot of fun. I also have Solid Gold Step which I've started but not mastered yet. I agree that Mission Possible may prove to be too easy. http://www.picturetrail.com/pwmatt
I changed my workout to a 40 minute run/walk. Alot of big hills! My butt was screaming! Felt great.
Hope everyone has a great night and great morning workouts for those who can do that in the AM (not me!)