I am slowly becoming a Cathe convert. I say slowly b/c I have most of the FIRM workouts and only a few of Cathe's. I am preferring Cathe's but $ is an issue.
I have BS/BF which I found too easy, Low Max, Cardio Hits, The Classics, C&W/IMAX2, SJP/SB, and KPC/L&G. I think that's all of them...