just wondering what you guys/girls think. why not join a gym you ask? well, the thing is i'm just using it as a form of cardio because i'm a weight lifter at heart and i just want have a different form of burning calories. plus, i just want to do it when i feel like it. for example i don't want to do it after working out my legs. is it hard to self learn? no one will be looking at my form and i know that if a person learns the wrong way it's hard to unlearn it.