I have Living Arts Lower Body, and either the abs or upper body workout, too. The reason I don't know which I have is because I never do them, because they are way too easy. I could probably get a bit more out of them if I concentrated more, but really they are just not challenging.
I'm thinking of getting Karen Voights new DVD, which has a ball workout on it, but I've read that it is really very basic, as well.
I think one of Gay Gaspers newer workouts uses a ball, but I'm not sure.
I haven't read any reviews of balance ball tapes that sound like good, challenging workouts, but I used mine with planks when I first got mine, and was challenged. I'd love a good tape to use...
Wendy