I had an early model with the 5 inch barrel that has the small muzzle break/weight on the end. Had mag. problems that S&W fixed and then the screws holding the front sight and the muzzle weight on kept coming loose while firing. I finally just wrenched the screws down and it seemed to hold. I read on another forum about the frames cracking so I sold mine. Not sure if there is any truth to that but decided to buy something different.
We have 2 P22's in our family, my wife's and my father-in-law's. My wife's is the grey bodied one with the long and short barrel. My father-in-law's is a 5" black on black. Both work flawlessly but they have their quirks. First off, the early run had a bad designed magazine, make sure you have the "-A" mags. Second, the barrel is held on with a screw on end cap that works itself loose sometimes. Not a big deal you just need to check it about every 500 rounds (or when you're cleaning it). The compensator (not really a compensator, just an add on for looks) will come loose if you don't check it too. All of the loose issues can be resolved with blue locktight.
Overall the guns are a blast to shoot, quite accurate and very hand friendly. I bought a Neos U22 and put a red dot on it but the wife didn't like the bulk and after she shot her dad's P22 she was hooked.
BTW, we have about 500 rounds through our P22 with 2 FTE's and 1 FTFs' both related to ammo (cheap 525 Winchesters). The other has ~1000 rounds through it with roughly the same performance. Overall we are very happy with ours. I think some of the bad press is from people who don't know or aren't willing to take the time to learn the guns quirks.
I was out of town at a conference last week & came across one at a fair price, so I bought it. I haven't even had a chance to fire it yet, but I'm looking forward to it. I bought the standard black short-barrel model.
I've owned mine since last Sept., had alot of feeding problems with mine untill I sent the original mags back to S&W and they sent me the newer ones with the letter "A' on them. Now the gun eats anything I put thru it.
I have one as well. I'm pretty sure that all my issues are ammo related. It's a great gun for practicing the basics, and the failures just allow me to practice failure drills. When this Winchester brick is shot up I'll try a different manufacturer and see if that solves my problem.
Mine is brand new. one of the walther/smith (both names are on it) The mags have the "A" on them, and I bought a second finger ext mag. I will probably buy an ext end cap to replace the one on my other mag.