So, I know there are a lot of Xers here, so - I really want the STS series. Actually, I'm getting it regardless. But, I recently started P90X and I'm just not sure - I'm thinking of returning it. I agree about the legs and Kenpo workouts being easy. I'm very ambivalent about these workouts. Seems like STS will be at least as good (probably better), and I doubt that I need both STS and P90X. Or do I? What do you that have done P90X think? Keep it? Why or why not? I'm interested in your opinions (unless you're ruserious, who we've already heard from). Please share.