I just picked this video back up after taking a break. I have a few workout videos, like Tae-bo, but this is my favorite. After only 2-3 weeks of doing the Abs one, I already started to notice definition in my abs. The arms programs are a bit more frustrating for me. The tricept and shoulder exercises I feel a lot (I use very old 3.3 lb weights) but I almost never feel it in my biceps! Sometimes I will do Arms program 1 and 2 just to make sure I am working my arms out. As for the Buns, I found that Program 2 is better for me since I have knee problems. Program 1 is just squats over and over and after the first set, my knee would give out and I would do the exercises wrongly. I find I can do at least 8 out of the 12 reps in Program 2 for each exercise and still feel good when I'm done! Just doing one program from each when I exercise, and the time flies by!