The thing about the Kel Tec guns, and the PF9 is no exception, is that they are like guns made on Mars. They are totally different from the norm and some people can't deal with that. The things that many people don't like about them are the things that actually make them great.
One poster casually mentioned 'hammer-fired' and the person who is not familiar with this system just thinks 'Old-fashioned - striker-fired is the thing now.' They would be wrong. There is a hammer but you can't cock it. You really can't touch it at all until you cycle it with the trigger and then its not likely you will be able to catch it. The hammer is concealed, like a S&W 'Body Guard' revolver, and also like that revolver the action is DAO.
Because they made the trigger on the PF9 so much better than the P11, they also had to come up with a safety which the P11 doesn't need. So, without the crude and vulgar 'second trigger' of the Glock and Ruger LC9s, it has a smooth trigger with an internal safety that performs the same function. The hammer always lies on the firing pin, but with a lightweight pin and a strong spring, it is not possible to make it drop-fire.
The PF9 certainly has a better feel in my hand compared to the LC9. I went to the gun shop the other day to get my hand on one and could not believe what he handed me - it looked and felt flimsy and the grip frame seems to be 'deeper' (from front strap to back strap) and really irritated me just handling it in the store. Typically the Kel Tec small pistols have a pretty good feel in comparison.
Any 9mm pistol in this category is going to have a violent recoil impulse. You don't take this out and fire 100 rounds. In the first place, once you have fired it enough to get used to it, know how to aim it and settle on your ammo, you only would shoot it when shooting up your carry ammo semi-annually. So the poster who wants to know 'life-expectancy/round count' is asking this of the wrong pistol. I cannot imagine putting myself in the position of firing one to destruction because I think I would be destructed in the process. :)
The terms 'cheap' and 'junk' show up in Kel Tec discussions but the guns are decent. I rely on my P11 every day, and sometimes go for over a year without firing it or changing ammo. Then one day I take it to the range, pull it and without any examination or other preliminary just start shooting. It always works right down to the empty magazine. I take it home, clean/lube and load it again. This is not junk but they are inexpensive - is cheap really a bad thing when you get a good product?
One day years ago I dropped the barrel in the garage. The barrel hit the concrete floor, bounced and rang like a bell. Picking it up, I couldn't find a single mark on it. The slides are tough like that too, and the chassis is a CNC-machined forged-aluminum part, not a stamped sheet metal one like most of the other guns in the class.
And I'll take this opportunity to say again that I believe the P11 and PF9 are the safest carry pistols in the world.
What I'm saying is look at the gun and understand what you're looking at before calling it 'junk'.