I have had a P-11 for many years and have never had so much as a hiccup out of it. Back when they made the P-40 (40 S&W) I bought one. 40 cal was a bit much for the little gun. It had to be sent off for repairs, however the P-11 and P-32 have been super. By the way, when I sent to P-40 to Kel-Tec for repairs there was no charge for anything and the pistol was back to me within 2 weeks.
Kel-Tec has since stopped making the 40 cal version which, in my opinion, was a good thing.
I would not hesitate to by another P-11.