Hi, thought I'd chime in here and mention a few things about the line. I collect this line as well, and overall the quality of these figures is top-notch; however, there are a few quality control issues for some of the MOTUC figures that you must be aware of (sorry if your aware of this stuff already).
King Grayskull - Original release had issues with broken ankles in packaging. This happend to mine
Roboto - Was release with backwards shoulders and also, some people have reported cracks forming in the clear plastic in his torso (at purchase and over time)
Goddess - Heard about some of these breaking out of package, people think it's an issue with the plastic they used (don't have one so I'm going from what I've heard)
Snout Spout - Heard about issues about his trunk cracking
Anyways, that's all that I'm aware of. I don't collect POP so I'm not really informed on those figures. Happy Hunting!