I've never done any of Billy's workouts, so Bootcamp seemed OK-fun to me, but I didn't have Ripped to compare with. One thing fun is learning how to use those bands. I think you can use them in some of Cathe's kickbox too, now that I see how it is done. Just watch the video preview on Collage and then use your own exercise tubes in a Cathe or Ripped workout and skip buying Billy's Bootcamp! They are all really the same and I think I would get tired of them pretty fast.
Beth