I love this series. This was my first Cathe purchase, so I will always have a place in my heart for it...
But, seriously. It is an awesome series. You can use it a variety of ways. You can use it as is, one body part a day after about 30 minutes of cardio. All the cardio segments are fun. You can double up with two segments to increase cardio time. You can do all upper body in one workout, too. Then of course, you have Leaner Legs, A.K.A. Meaner Legs. This series has everything. It makes time go by really quick.
Some people consider these weight workouts, endurance workouts, but I personally don't believe so. Each upper body part is performed at 3 sets of 12(something like that?). So it can be used for some pretty decent muscle building, especially if you go on the heavier side.
I recommend it.
Marla