I can't imagine buying a gun for self-defense and not putting a couple hundred rounds through it. No matter how good the reputation of the gun or manufacturer, you can't know for sure until you do that.
I had a K9, now a PM9. Both are different from most of what I am accustomed to shooting, but very concealable for the caliber. Never had a malfunction.
Well I am glad the PM9 is working well for you. However I do question the need to fire a couple of hundred rounds to get the kinks worked out. In my case, I fired approx 100-150 rounds, and every time the first 3-4 rounds coming out of the magazine would stick and I would need to pop the end of the slide with my wrist. I took it to a gun smith, he smoothed it down supposedly and it still did it. Plus the magazine would pinch my skin every time I fired it. It was the most uncomfortable handgun I have ever fired, in my somewhat limited handgun experiences. I now conceal/carry a Taurus ProMillenium 9mm which is a 3 1/2 in barrel and larger then the Kahr PM9 with its 3 in barrel, but I can still conceal/carry effectively with that. Also I have a Springfield XD9 Sub compact 3 1/2 in barrel, which is a little wider that the Taurus, but still I can conceal/carry that if necessary.
I am glad the Kahr PM9 is working out well for you. That's the most important thing, that you feel good & comfortable & confident with the handgun you use for conceal/carry.
TTY