funny that you ask. i just received mine in the mail. haven't started yet so i'll let you know how that goes.
i start, go for a day or two and then quit. i once made it three days in a row...ha!good luck if you attempt it! i hear if you stick with it, it's fabulous. and it is only 20 minutes.if i don't drag my butt to the gym i dont work out, period. my mind strays when doing a dvd at home...i think of all the other things i'd like to be doing and i slack on the dvd.
I was doing it before I broke my foot and I loved it. It really kicks your ass though. I hadn't even made it past level one and I had been doing it for weeks!
I own it and have done it a few times. I'm a wimp so I can't handle it. But I do recommend it. It works if you do it. I also like Biggest Loser yoga!