I am very happy with mine. I like all-steel guns, and the Guardian is a solid little work of art. The P-32 may be lighter, but the Guardian feels more solid in my hand. It definitely looks better. The gun is small, but surprisingly heavy for its size. Quality is top-notch, NAA throws in a nice belt clip rug and a spare mag. Their customer service is second to none, and they even have a custom shop where you can have the Guardian fitted with Novaks, or get it dehorned, or checkered.
The Guardian is my "always" gun. It's small enough to go everywhere, and I keep it stoked with Speer GoldDot JHPs. Silvertips work well too, as well as any FMJ. Last round likes to stovepipe, but I don't mind that since it's a handy "slide stop" empty indicator.
It is definitely not a fun gun to shoot, as it gives the trigger finger a nasty little snap. You get used to it, though. Accuracy is not match grade, like all mouse guns. I can keep 'em in the nine ring at 7 yards with rapid fire, and that's good enough for close-in work.
Trigger is DAO, and there are no external safeties to mess with. I used to have a Beretta Tomcat, but I had this scenario in my head where I have to use it and forget to take it off safe. I traded it in and paid a little extra for the Guardian.
The whole gun feels very tight and well-crafted, and it looks nice. It may be a little heavy for such a small gun, and the only real drawback it has is its price sticker. I got mine for $320, which was a decent deal. The Kel-Tec would be cheaper, btu I just don't like the look and feel of the P-32. Call me a traditionalist.
You could do a lot worse than a Guardian. Of course, .32 is thought to be less than optimal for self-defense, but I can tell you that the Guardian comes with me where I can't even take my SIG P239--and a .32 that is this convenient beats a 9mm or .45 that you leave at home because it's a pain to carry and conceal.