I've been doing the rotation as written and dropped a pound or two - but I vary so much at this point in life,I'm not spartan on diet anymore,eat well,but prolly too much! I LOVE the program, the intervals and burns are effective when I work the intensity - didn't lose any cardio endurance when I tried out my first spring jog(thank you God, spring has come to VA!),and I saw new cuts in my arms.....
I'm really spoiled by the length of them...so, for the money, it was well worth it to me! Kathryn does it too -but she's awesome - she really cranks the weights up, so she likely is seeing awesome progress!