I find the Gym Style upper body workouts to be almost dauntingly difficult. The Pure Strength series is relatively easy for me, and I enjoy PUB/PLB and feel slightly sore (in a very good way) for a couple of days afterward. But the Gym Styles have killed me, both during and after, every time I've tried them. For instance, the drop sets of pushups at the beginning of the chest work on Gym Styles - FINALLY I did them all, then could barely move for days, and it wasn't worth it LOL!!! I almost always use the same weights Cathe uses on all of these workouts. I have a scattershot approach to all of these weight workouts though - I do each of them maybe once every two months interspersed with a lot of other strength training dvds - maybe if I really concentrated on the Gym Styles and did only Gym Styles for a month I could bust throught this plateau. To me, they are killers, though. I think I'll do the premixes next time around, that would probably be plenty hard enough!