I've had my P3AT for about 8 months now. Last weekend I was putting a few rounds through it after I did little fluff and buff to the pistol, to see if I could get it to work more reliably. After about 30 rounds my hammer spring broke (doh!). Sunday I emailed Kel-tec, and told them what happened. Monday they responded saying if I felt comfortable they would just ship me the pieces. So I gave them my addy and as of today (friday) the spring, plus a new hammer, and a few other pieces were here. They gave me a lot more parts than I needed, but I'm not complaining about that at all. Pistol seems to be in working condition (gotta go test fire it to find out).
My only complaint is that kel-tec said they'd ship me some instructions on how to replace the stuff, but they never did. It woulda saved me a half an hour if I wasn't trying to figure out how everything went back together. All is well I believe, since it seems to be working again. Not a bad experience with their customer service at all.