One of my friends who is very into working out and his physique, maybe a little too much. but he recently completed p90x and swears by it. I've read on here that it's a beginner workout and is nothing too special. I've also read on here that doing things like, cardio, plyo's and other workouts are bad when you do them non stop like p90x instructs. My friend said pushing muscles to never stop and to complete failure is how they literally and figuratively, get 'ripped'. He said Toni Horton the creator, is ripped so he knows what he's doing. He just thinks it's such a special workout and advanced that it can make everyone alot stronger and it's super hard and to go to muscle failure... i disagree,, but i guess i need everyone's more official advice on the matter, maybe Chris and Steve etc. Thanks guys