Studpile,
If you are planning on purchasing one of these pistols for self defense, is this the only weapon you can afford? If it is, any weapon is better than none. If not, I would save up for a quality handgun from a quality manufacturer, and I do not think Kel-Tec fits that bill.
If money is a problem, you can pick up a good used reliable .38/.357 revolver from Colt, Ruger, or S&W that will give you five or six (depending on capacity) for sure shots. This beats the heck out of a semi auto that turns into a single shot boat anchor when it jams on the first round fired.