The vast majority of the P-11 are stone cold reliable, but enough are sold so that a few seem to give problems.
Mine -- I no longer have it -- was reliable from day one, and accurate.
There was a period, last year, when a lot of them were produced with take-down (slide stop) pins that worked their way out. It was apparently an out-of-spec part from an outside vendor. Nearly all of those problems have been resolved. But it got Kel-Tec a lot of bad press. (I'm amazed that some of the junk guns don't get the bad press...)
They are more difficult to shoot than the P32, but still good guns.
(I switched to a Star Firestar Plus; single-action only, easier to shoot well, and only a little heavier. Same general size and capacity. Parts are a bigger problem for the Stars than the Kel-Tec.)
From owning both guns and following various KT forums, I would say that there is probably a greater % of out of the box reliable P-11s than P-32s. Not a scientific analysis of course.