I bought one a few years back. Shot it shortly after that, and it performed pretty much as expected. Nothing spectacular, but didn't disappoint.
Bought a WMR framed "Sheriff" model later, mostly because I liked the name, but haven't tried it out. That one has since been dressed with some really handsome genuine elk-stag birdshead stocks, which I'm sure will make it harder to shoot than the bigger boots that it came with.
Earlier this year, I took the first one, which had since received a set of the bigger engraved boot grips, out back of my cousin's place in Tennessee while visiting, and shot it some more. All the ammo we had available for it were Shorts, but I still enjoyed it enough to develop some new respect for what the gun can do. I carry it sometimes in my jeans watch pocket, turned butt-to-left (I'm left-handed) and hidden behind a cellphone holster.
I bought a third NAA earlier this month in .22 Short, just to have more than for any other reason. Also found 190 rounds of CCI Shorts in my ammo stash, dating back to the early 1990s (used to shoot them from a .22LR revolver in the backyard of a more-isolated place I had at the time) and am looking forward to trying out this latest one.
So, be careful. They multiply.