From my list of guns that didn't work:
10. Norton TP-70, .22 Autopistol - didn't work. Misfired in SA mode with a round in the chamber, and fed horribly. Chamber was so badly peened from excessive dry firing that the fired case would stop and stick halfway out of the chamber, extractor hook was so long that it popped the empty case out of the recess in the breech face such that the case would spin around and cause a stovepipe sometimes or just remain inside the slide and block the next round from feeding other times. Wouldn't go bang in DA mode. Firing pin hole in the breech face was so enlarged that the correct orientation of the keyhole-shaped end of the firing pin was not apparent. Slide was so soft that the slide lock notch would peen out of shape and not lock back after 5-6 mags, and then have to be carefully hammered back into shape to work again. Peppered the paper target with holes randomly distributed in a large pattern - had no noticeable accuracy.
Good points: Nice grips, I believe they were nylon. Stainless - didn't rust. Lots of features for a tiny gun, like last round lock back, a hammer, DA/SA - useless since they didn't work.
Add a price tag of nearly $400 and I would have to say that it was my most disappointing purchase. Runner up was a jamamatic Beretta 21A.