how are the Chair Dancing workouts?

[bfit]

Has anyone tried any of the Chair Dancing workouts? I'm trying to find a couple of workouts for my sister-in-law who has had foot surgery. In another thread a kind VFer already suggested Margaret Richards "Getting Better", and that looks great. I looked at Chair Dancing clips on Collage and was undecided about them. The Sit and Be Fit clips definitely looked too easy for her. She is not a senior citizen, and I would say her fitness level is beginner/intermediate.