I had a Kel Tec PLR 22 that was nothing but junk. I sent it back to them twice under their lifetime warranty and the gun smith finally called me and said what do you expect for a 22. I told him i expected it to shoot not bend the bullets and jam. Never again will i own a Kel Tec.
Precisely my experience with Kel-Tecs, but with the P40 (twice) and a P11. They might, depending on the models, be cheap, fun guns to shoot and to practice clearing jams, but I would never, ever choose to bet my life on anything from Kel-Tec.