I've been doing the XTrain/LIS rotation and am in week 6 right now. Aside from the fact that I LOVE, LOVE this new series (especially combined with LIS) - I have more energy and am more motivated than I have been in longer than I can remember. And, I am excited to report that I am wearing a pair of pants today that I haven't been able to wear in a couple of years!! This series is doing wonders for my lower body. I can't wait for week 12!! Then, start again! Thank you, Cathe for what you have put out!! Simply awesome!!