It is my briefcase gun, and pocket gun on last minute trips to store or CVS.
My friend had a Keltec in .32, and he said he had problems, and with the great Keltec customer service, he told me to expect problems first time out, ship back and no cost and you would get a reliable gun.
Our first session with PF9, I had light primer hits and he had his slide lock open sometimes with rounds in mag. I also had a few failure to feed with WWB.
We sent them back and they have been flawless since. It has been perfect with Fed 9BP, Fed Nyclads, Speer 124+P (which I don't recommend due to recoil), Federal Hydrashocks and I put a hundred rounds of my carry load, the Fed 124 HST with no malfunctions. For practice ammo, use Federal or anything BUT WWB.
I do reloading and took my micrometer to different bullets, and the WWB OAL was all over the place. Some rounds were so long they probably dragged up the mag tube.
Best $9 investment I ever made was putting on Hogue rubber grips upside down and a little trimming near magwell. It went from a painful gun to shoot to an easy gun to shoot. Before the Hogue, I would shoot one handed, and the gun would torgue in my hand, despite the death grip on it. With Hogue, it turns it totally into a different gun, and adds very little bulk. As you know with a light weight gun, it is critical to maintain a very tight grip. I carry the PF9 in my front pocket with the Desantis holster.
Granted, my Glocks and Sigs are my front line SD weapons, but here in Florida, this is a quick pistol to just grab and put in your pocket.