I've seen one PMR 30 in store, and passed it by, even though it fit into the budget of my shopping at the time. Just felt phony, if that makes any sense.
As to the KSG, I'd love to see one before making judgment. I've not had good luck with either Kel-Tec I've owned, and like previously mentioned, didn't like the feel of the PMR, but the KSG definitely has usefullness written all over it, with it's twin tubes.
That said, there as been previous attempts at this design, none good. I'll try and find some links, but IIRC, one came from Turkey, and I completely love my one Turkish weapon, SAR K2-45, which has excellent fit an finish, and has been extremely reliable. I need to find those links, as what I've read stated the twin tubes weren't reliable in feeding/switching.
*edit* found it, NeoStead 2000 (NS2000). From South Africa, not Turkey, my bad. Wiki link,
http://en.wikipedia.org/wiki/Neostead .
Still looking for the reliability articles..........