The .22 mag. has stopped more than a few fights. Telling someone they are unarmed when carrying one of these would sound to foolish to the wife of the cop that was killed with one, or the mom of the thug that was killed mid-mugging with one.
I did what another poster suggested, and replaced the grips on my .22 mag. with the rubber grip panels.
Mine is with me when I can't carry anything larger.
(I have the one with the shorter barrel than the one shown.)
I've owned the .22 version before, and the smaller grip left it standing straight up after each shot.
The larger grip on the magnum makes it much easier to shoot.
But, even this little chunk of steel may get irritating thumping against your leg in your pocket.
I'd add a little nylon pocket holster from Uncle Mike's.
To answer your question, they are reliable and well made, and the company has excellent customer service.
The KelTec .32 or .380 are going to be close in the weight department.
Not much superior ballistically
in my opinion, but you could argue that.
For a buy-it-and-shoot-it gun, I'd go with the NAA.
A KelTec has a higher likelyhood of needing some work before it could be carried.
But, they can be made into reliable guns.
(I've owned 5, so I know what I'm talking about.)