What I like best about P90X2 Ultimate is the challenge of the workouts. Some of the moves are so tough that I couldn't even do them my first time. This is good because when I could do them I had a much greater sense of accomplishment then when I just add more reps onto an exercise I could do right from the start. The program did great job of explaining and demonstrating the workouts and modifications. The best part was that each week I showed improvement - this is the entire point. I cannot recommend this program enough.