I carry my PM9 almost every day, with a spare magazine or two on the other side. It sits in either a Crossbreed SuperTuck, in a DeSantis Nemesis pocket holster, or in an ankle holster. If I'm carrying my Glock, it is my BUG.
I have the MA version with the night sights... amazingly, there's this switch on the side that I never use...
I'm very pleased with it. It broke in flawlessly. I think that some of the nay-sayers are complaining about the price compared to other 9MMs. Additionally, there was some issues / questions about the length of the trigger pulls.
The Kahr K9 was approved for use by the NYPD as their backup sidearm. The length of the trigger pull was dictated by the NYPD, and many of the older Kahrs had that trigger. Eventually, Kahr started selling handguns with the "Elite" trigger (with only a slightly shorter length of pull). Unfortunately, there wasn't a way to tell which guns had the NYC trigger, and which had the Elite trigger, so I think that that confusion turned off some people.
I'm guessing that those that are not fans of the Kahrs developed that dislike "way back when," and those that are fans are newer users.