I bought one last week after researching the Kahr series for about four months. My son and I took it to the range the following day for the 200 round break-in. First off I regarded it as a bit of a gamble with the negative comments I had seen in various sources concerning reliability. Here is my personal experience:
The ammo used Remington FMJ, Winchester Silvertips, and Remington Golden Saber.
Accuracy: Far better that one would expect for a gun of this size. I regard myself as an above average shot (one of the top three shooters in my department of 75 officers for the past 15 years) but I can't shoot a real gun as well as some can shoot their keyboards. I was able to keep all rounds in the 10 ring of the B-27 at 15 yards and make a clean run on 8" plates at 25 yards.
Ergonomics: I wear a size large glove. The gun fit my hand perfectly. The grip surface is a little aggressive and becomes uncomfortable after about 80 rounds. I don't plan to change a thing about it, it works.
Recoil: Less than expected. I read frequently about those who chose the CW9 to avoid .40 recoil. The recoil was very controllable. Although I have developed some arthritis in my wrist, I had no discomfort from the recoil and my double taps were easy to perform.
Controls: I love the trigger. Back when I shot revolvers competively I would have killed to have a trigger this sweet! The trigger pull is both smooth and light.
Velocity loss: This was area I was concerned about since it has a 3.5 inch barrel and does not have the polygonal rifling. I chronographed the 165 grain Remington Golden Saber out of the CW40 and my issue Glock 23 (4 inch barrel). To my surprise the Kahr clocked an average of 1057 FPS to the Glock's 1054 FPS. No loss of power in my sample, or maybe my Glock is a "slow" gun.
Now for the negative, twice between 50-100 rounds the slide release locked the slide back with rounds in the magazine. It happened again at about the 150 round point. Later at about 200 rounds this happened three times in single string of six. I could detect no visible cause for this (nothing was in contact with the slide release). The magazine release spring is undamaged.
The gun has been thoroughly cleand and lubed, ready for another range date. Although I expect my guns to be 100% out of the box, this one has so many positives that I'm willing to work at fixing this one problem area.
All that is neccessary for evil to triumph is for good men to do nothing