I hope you haven't signed up. I think there are some people who like it, but as a brave beginner, I thought it was too hard and too long a pause between "customized" exercises. Basically, they have recorded a zillion exercises with the various trainers and they patch them together differently each month.
My biggest complaint is that you were supposed to be able to cancel with just an email and I have been trying for a while to get cancelled and they just keep charging my credit card. Calling the credit card company next.
Good luck - I think the Biggest Loser workout DVD is better -- and cheaper.

To be fair - I heard from them yesterday and they refunded me the month 4 DVD. They had an excuse, unlikely as it may be, but they did get back to me promptly after leaving a phone message.

I won a 6 month subscription from this site and did NOT like them at all! Petra's Low Down was OK, but the rest were just too difficult, even for someone used to doing 3 or 4 miles at a time! I am cancelling after I get my 6th month.