RE: Which is the masterpiece? Which series would you re...
I'm not doing a CTX rotation, but I've noticed major changes in my endurance and waistline since adding CTX to my workout regimen, so it's got my vote. And I can't believe how hard I work during those 30 min cardio sections! I'm more wiped out doing them than doing an hour Cathe step tape! It's too early to tell what the Intensity Series will do for me since I just got it--I love the premixes, but CTX seems like her masterpiece.