If it a great pistol I own one and felt very comfortable carrying one. Fully loaded it contains a lot of firepower and 31 rounds of 22 magnum is nothing to sneeze at. Mine was very finicky at the beginning and I had to shoot a lot of different brands to find out which were the most reliable and did not create failure to fire or feed or stovepipe. In my gun the 40 grainers and higher weights all function reliably . The lower grain rounds won't cycle my gun that well.
Another concern is the magazine release, you may accidentally actuate it with the palm of your hand because of its location . There are after market parts one can purchase and install to alleviate many issues that were very common, personally I have not had the need to do so with mine.
Smith and Wesson also sells a 22 magnum semi auto that holds 30 rounds which I also own, though a couple hundred dollars more than the Kel-tec definitely worth the money as this hand gun seems to eat whatever you feed it.
As has been posted if you do buy the Kel-tec also buy the mag loader for it if not, you will have issue the bending the cartridges when to try loading the full 30 rounds. Brass on a 22 magnum is very thin.