Does anyone have this workout, and if so, what do you think of it? I have had this one for almost 2 yrs. and have only embarked on it a few times. I pulled this one out yesterday and was becoming a little frustrated with it at first, but then got into it and started to enjoy it. I sure worked up quite a sweat and I can feel it in my abs, butt and legs today. I guess it's the constant changing in equipment/exercises, then I would forget what leg I was on and had to keep rewinding. I also used a 10lb. medicine ball which encouraged the sweat factor, but modified some movements. Any comments?