I've had my P11 for over a decade now as my carry weapon - although only started daily CC within the last year, it was an occasional-open-carry weapon before that. Only thing to look out for is to get better-than-blued finish. Especially if you're going to carry IWB or in a damp climate. (In my case, both.)
If you're the original purchaser of a Kel-Tec, you also get a lifetime warranty, and my experience with their service has been excellent. (Sent it in for an overhaul last year, wonderful service.)
I've *NEVER* had a mis-feed with it. It takes even the cheapest 9mm I throw at it, no problem. (Because of its reliability, I've had a friend give me cheap 9mm that won't reliably load in his weapons.)
There are definitely better weapons out there, but while Scooby wouldn't trust his life to his, I absolutely would trust my life to mine. Getting a bad weapon will obviously sour you on it, though, fully understandable. As Caff said, put some rounds through it first (I'd suggest about 100.) Make sure you fully understand it before you make it your daily carry.