Shaz -
I have the Pyramids too. People say they have noticed a lot more muscle definition in my shoulders and arms since I started using Pyramid Upper Body.
I don't know about the Lower Body specifically, since I have a couple of other workouts I use (Legs and Glutes; Leaner Legs), but overall, since I started using Cathe's leg workouts, my hamstrings and butt, especially, have tightened up.