Well...since you asked! I found my lower body slimmed down quite nicely with the Slim Series. I'm always afraid to mention it to people though because this is a series that you're either really going to love or really going to hate. The only thing that bugs me about this series is the horrible background form of one of the exercisers. He bugs me so much that I usually avoid doing 2 of the wokrouts he's in because I can't stand looking at him! That being said, Debbie is a great instructor and all of the workouts (there are 6) include lots of lower body work, some standing, some floor. Tone it Up is all leg work, and very effective! When I do a SS rotation I usually do a Cathe cardio every other day because I think this series lacks aerobic benefits. But, it has slimmed my hips down nicely.