I've only had mine for a couple of weeks, but I think it's a great gun. Aside from the extreme concealability and ingeniously small size, I really don't think it's any wonder gun or the greatest thing since sliced bread and Skippy peanut butter. Mine is just a kind of an ugly little guy that does his job really well, which is all I ask of him.
I took the time to clean it and lube it before I used it, I worked the slide a bunch and cycled a bunch of rounds through it. I loaded it up with ammo that I new to be good from my experience with my Bersa (Remington FMJ and Federal Hydra Shok JHP) and ran 100 rounds of FMJ and 50 rounds of JHP through it. No fluff and buff, no trigger jobs, no nothin' other than a a stock pistol, time-proven yet basic range and self defense ammo, and a very firm grip. I broke it in like I would any other automatic pistol, and it responded like any other automatic pistol.
I can't say that I've had an life changing event because of it, and really no epiphanies either - other then just how well this little guy conceals and carries in a front pants pocket. I can't speak for why a few others have had problems with these guns, but I can speak for why I think I haven't: I've left it the heck alone and allowed it to operate as conceived and designed. Maybe some guns won't ever have a problem with owner "enhancements" and flirtations with ever more powerful ammo, but I think when you get in there and start monkeying around with it, and you're not quite as good a gunsmith or ballistics expert as you fancy yourself to be then you're flirting with disaster - or at least extreme aggravation.
I think that due to it's uniquely small size, little things that would mean nothing on a larger gun become significant in a P3AT: more sensitivity to bullet shape, powder loads, pressure, and firing technique. On top of this, this small size it is famous for can also be it's down fall as it is operating just this side of acceptable size and weight of gun in relation to the realities of the .380 round. You can't escape the laws of physics, and these laws are even harsher for small guns. I think if Keltec has any problems, it's in the realm of acceptable tolerances on their guns and maybe they need to tighten-up the specs: this would mean that less guns would pass muster, but less "lemons" would hit the street. No doubt, though, that this would then raise the price. And if the price is the issue, then don't harp about the occasional lemon. This is a fact in any business, and its why a Rolls Royce costs much, much, much more than a Hyundai, or why a Wilson custom 1911 costs much, much, much more than a Springfield 1911.
You get what you pay for. I wanted a gun that packed a big enough punch for self defense, but that I could just drop down a front pants pocket and got be-boppin' on my way. In my mind, such a gun does not need to be a beauty queen or made from exotic materials - it just needs to work, and I don't think tht such a gun should cost much more than what Keltec currently charging for the P3AT. (It's not like it's made from unobtanium or has a built in GPS system for greater target acquisition - it's a basic pocket pistol for crying out loud). The P3AT performs its primary function in a way that not other gun can, and it does this very well. However, I also realized that I might need to go through a few trips to the factory to get it there. However, the ingenious design, price point, and unique ability to be carried without print makes it worth my time to be just a little patient with this gun.
However, as flawlessly as it has performed thus far I don't foresee any future problems. It's just another gun and a very useful tool, but it performs its intended function very well and has reached the status of most frequently carried handgun in the Ogre arsenal.