I guess I am in the minority, but I think CK is awesome, intense cardio. I did KPC off Fittv (I know it's not the whole workout) and find CK more cardiovascular challenging. I am not big into punching and jabs, (too boring) but if you have alot of floor space and like more cardio, CK will give you a good workout. The first time I did this though, it seemed too easy, but once I learned the choreography, the next time I did CK I got pretty winded. To each his/her own, but I find this one underrated. Tae Bo Advanced Live series from years ago is very good as well. I don't think they are still in print. Cueing is poor, but good workouts if you can find them.