"Nasty Little Tool of Desperation"
How I once described mine. But a tool it is. My least favorite, but the one I'm "in contact with" the most. Get the belt clip for it, park a cell phone next to it, and it's accessible and invisible.
(Mine had to go back to the shop when it was new. Slide replaced. Now, fine.)
Keep an eye on the recoil springs. They can get kinked. Not a bad idea to replace them , hmm, maybe every 500 rds. KT sends 'em out free, along with a new guide rod. (Person I spoke with at KT also admitted that, yes, the P-3AT works more dependably with "zippier" loads, but that it gets taken out on those poor little springs. Oh --- and your hand, too.
Federal Hydros, Silvertips work OK with mine. Magtechs are iffy, for me.
The thing cleans up in five minutes. Be religious about it. There's so little of it to work, it doesn't take much, proportionately, to make it not work.