Interesting that some have had experience with half a dozen or more with problems in all, and others have had the same number with problems in none. Leads me to think that you get what you expect. Perhaps if you have one that has a rough finish, you tend to think "ah well, I only paid $300 for it", and ignore the issue, whereas if you spend $3000 on something and it has a burr not removed on the inside of the grip, you say "WTF!".....or maybe it's the other way around and if you paid $300 for a norc, you aren't embarrassed to say "what a POS! But what can you expect from chicom crap?", whereas if you spend $3000, you might be embarrassed to admit issues. Ferraris spend a lot more time in the shop than fords, but you don't hear Ferrari owners negatively comparing their reliability to ford, that would be embarrassing.....
Fit and finish on mine are "rough and ready", but they have never failed to function perfectly.