Cathe Slow and Heavy series. Had it for years, still wrapped 3 VHS in a box. Did them last week, and, since I don't have a 40lb dumbbell, they were rather nice and easy. Even on wonky knees.
Cathe Bootcamp wasn't so bad. I just didn't like the 1 minute format, and can no longer jump around a lot. Not just b/c of knees, but you can hear everything in this apartment and I am above someone else.
I want to order the Insanity workouts, but there is so much I can't do here. I did have a couple old P90X, can't remember which ones, but I thought there were boring.