I have Power 90 and I dont like it at all! I think Tony Horton is very boring and there is no music whatsoever! :-( He makes stupid jokes that he thinks are hilarious, and I was wishing this agonizing workout would be over soon. There is a clock at the bottom of the screen so you can see how much longer you have. In my opinion, save your money and stick with Cathe or the Firm!