I've got one with a 20" barrel. An older model1sales upper on an aero lower. factory trigger. Had trouble with light primer strikes when i first got it. Some dremel work on the firing pin and bolt, and a heavier hammer spring fixed that. I have a 9rnd and 25rnd mag. 9rnd feeds great. 25 rnd feeds great for 13 rnds or less. I usually only load 5-10 at a time anyways so it doesn't bother me.
When shooting steel cased wolf ammo, a couple times i had casings getting stuck in the chamber from the lacquer coating. This was after shooting 50-100 rounds (in 5-10 round strings) in a gravel pit. Cleaned it and then it cycled great again.
Now i just use it for coyotes around my place. That gun is 2 for 2 for dropping a coyote dead in it's tracks at about 75 yds.
I like the gun. I prefer the feel of it over an AK. It's definitely more accurate than the one AK i've shot. Recoil is very mild and it's plenty accurate for me. (.5" groups at 60 yds last time i shot on paper)