I like the Intensity Series more because the BBs are easier, especially for weights. There is no real upper body workout, and what there is is too easy. This is not to say that I don't like any of them. I really like KPC, LG and SJP, although I don't like hi/lo, the segments are so short I don't mind them. I like StepBlast a lot too. It's fun, but I don't like PP and SS. In the Intensity series, I don't much like Cardio and Weights for the same reason. I never do it, but I do use the All Step Premix as an add on and I enjoy Imax Extreme. I also like the abs of CW and often just add them on to something. I guess if I had it to do over I would still buy all the Intensities and not SS/PP.