I have only done Strong and Sweaty cardio slam and the shoulder segment from Upper Body and I can say, I Love This Series So Far!!! How is it that Cathe can take moves that you think look so simple and easy, yet your breathing so hard and really feeling it!!! She also comes up with a good variety, I know we're all getting older but I am really thankful that there is a Cathe out there designing such good solid programs!!! One other thing, how does Cathe and Jai stay looing so young, I know about the exercise but please share what your drinking because I want some!!