I just started the CTX rotation last week and am onto week 2. I LOVE this series! Although I'm still sore from Leaner Legs, it was a great feeling of accomplishment to be able to get through the entire tape and with almost as much weight as Cathe used on the barbell. I can't get over how fun this entire series is and how versatile it is - I double up on weights one day and do just the cardio the next and so on, which seems to work better for me. Also, I'm thinking of combining 2 cardio sections one day and doing 2 UB weight sections the next day to see how that works. The possibilities are endless! I love every one of the tapes equally, but they're all different. I can see these are going to be used a LOT by me from now on.