I have the PM9. It is by far my favorite EDC pistol. I've had no issues with mine what so ever. I think it's a bit big to be considered a true pants pocket pistol, but carries well on the hip or in vest or jacket pocket. Anything smaller in a 9mm I think would not be such a great shooter. The trigger ,at least on mine is smooth as butter,and the accuracy is very good for a gun of it's size.
To me it feels very much like you'd expect a XD9 single stack to feel. But is made by Kahr. If I had anything negative to say about the PM9 I would, but how can you say anything negative about a pistol that is well made, reliable,accurate, and is comfortable to carry. It may not be a pistol that works for everybody because they are on the upper end of the price range of small 9mm pistols but I'm sure enough happy with my purchase of one. I also like the Walther PPS 9mm. It is also a bit spendy like the PM9, but is it really if you intend to use it as a SD carry pistol?