Cathe's is controlled (and you can take the impact / intensity down by not jumping, etc.) and has EVEN REPS on each side. It's easy to modify in terms of time (warm -up, first section w/ stretch, cardio section, the drills (3 different ones), abs, etc. The DVD also has premixed combos of the workout itself AND also incorporating portions of Legs & Glutes.
I like it much more than Tae Bo because of the music, the moves (well-planned, almost choreographed to the music), everything.