Has anyone tried "Core Rhythms" DVDs? If you have, how did they work for you?

I got core rhythms a few months ago. Just the starter set, I didn't join the club or anything.

The workouts are okay, but really kind of hard. Getting the steps down is difficult, even with the help section. The workout does go by pretty fast. I have retired the core rhythms in favor of the Firm.

I have Core Rhythms and for me it was a waste of money. I did it for about 2 weeks and it was difficult to get "in" to. The instructor to me was also boring.