I've been at both extremes with Kahr.
I used to own a Kahr K9. Despite a wide assortment of ammo, new mags, and two trips back to the factory, it would barely shoot through a single magazine without a failure to feed. As much as I wanted to like the gun, I finally got rid of it at a loss simply because it could not be relied upon for it's role as a CCW.
My second experience with Kahr is their Auto-Ordnance WWII repro. Except for an extractor that kept failing to retain it's tune, it has been one of the most reliable GI 1911s I've ever used. Swapping out the part with an aftermarket one from Cylinder & Slide solved that problem. I think this is more of a blame on Kahr's OEM vendor for small parts versus actual workmanship of the piece.