Jen,
I have only been doing it for 10 days !!!!!!!!!!! This series is amazing !!!!!! :7 I began on 30th January,(I have also thrown in a Cardio & Weights, and a Powermax session, instead of, on two nights) and have been going for it literally. I am also throwing in the bodypart workout from MIS as an add on, so if I do Step & Intervals Chest, I will add on the MIS chest workout too. This is because I really love doing the weights, as much as the cardio actually, and I have PH withdrwal symptons ;(
Keep us posted on your progress, and good luck !
Anna