I have a PM9 and a G27 (same as G26 but .40). The PM9 is new. I've only put about 200 rounds through it. I really have to sling shot the slide on the PM9 with the intial round. If I don't it doesn't feed right, the cartridge jams at the ramp and holds the slide open. -- If I really yank the slide with that initial round it feeds fine.
Other than that, I have had no problems with it at all, even though it was in it's "break in" period. I've also found that I'm not quite as accurate with the PM9, when comparing the two. That may just be me though. --- I like Glocks, the G27 hasn't been my only one. I really do like this PM9 too. I like the trigger, the size (easier to carry), and the recoil is no problem from such a little gun. The accuracy is acceptable, but as I get more used to it, that will no doubt improve as well. --- I wanted a smaller package for summer carry. I would recommend the PM9. I may still carry the Glock in the winter, we'll see!!