Good to see its out there, but Eric is right. Its not that much smaller than a Glock or Kel Tec. I think .380 is a marginal, though valid choice (just not enough gun for me to be comfortable with and the ammo issue is the nail in the coffin). Frankly, my default answer is to get the G26, or if you can't afford it get the Kel-Tec. Both will work. If you need tiny, go with the Kel-Tec .32 (not enough gun) or the Bond Arms derringer in 10mm or .357 (plenty of gun, but SA and two shots). As far as a $400 folding knife? I can buy six good quality blades for that price.
FQ13