I'm with jgoycoolea, I am not the biggest fan of PUB and PLB.
I agree with her assessment of PUB: the shoulder work excludes the two best shoulder exercises, in my opinion, upright rows and Arnold's press/military presses, and the three exercises included go so fast you can only use a light weight throughout. So, this puts PUB heavily in the endurance workout category, which, I really don't need for my upper body. I need strength building, heavier weights, slower pace. PUB is very fast. I often have to totally ignore Cathe's count, finish each set after her in order to get my reps in, especially with chest, then rewind her and join back in. The only part of PUB I really like is the section for biceps which will really fry your mental focus and the core section is fabulous. Still, I haven't done it in 4 years.
PLB irritates me for a different reason. I don't mind the changing of the plates at all, what I do not like is the lack of variety in the exercises chosen. You work the quads, gluteus maximus and some inner thigh, a lot. It is not a fully rounded workout. In order to make it so, you would have to do the floor section and quite honestly, it is nowhere near as good as the floor section of GS legs.
PUB and PLB are great if you want to work some muscle groups for endurance work and want to make it quick and dirty and get it over and done with. But I still prefer the GS legs for lower body and CTX upper for the best upper body endurance workout.
Clare