Unlike Bill DeShivs and others, my experience with Kel-tec has been very bad in terms of quality and reliability, and they have been on my permanent no-buy list for several years. I think Ruger took a big chunk of their business with the LCP, and deservedly so.
My Pf-9 was better than some of the others, only a couple of malfs in the brief time I had it.
I ditched it mainly because I didn't like the way it shot. Stiff recoil and lots of muzzle flip.
Unless you plan to pocket carry, I would save up a bit and get a Smith & Wesson Shield. There are several other good small 9mms for belt/IWB carry also--Beretta Nano, Springfield XD-s, Glock 26, Walther PPS M2 come to mind. These are all a bit chunkier than the Shield, which is slim like the PF.
If you are looking for a pocket carry 9, you are searching for something I consider to be the Holy Grail of CCW, and I have not yet been successful. I would look at the SCCY CPX-2, which is similar in price and design to the KT P11. People sound happy with it but who knows, there are Kel-Tec fans also. I had a Ruger LC9s, and it was more comfortable to shoot than the PF-9, but it failed to feed two different hollowpoint loads sufficiently and I ditched it (not a big fan of Ruger QC these days either). I also have learned to avoid Kahr and Taurus.