[Cliffradical]

Good God, they're awful. Please listen to these nice men and avoid at all costs.

The rolled steel AK bodies are almost totally sweet except that all of the buttons, switches, clasps, screws, rivets and thingamajigs are absolute garbage.
This is before we even get into the awful (though pretty) internals and the cursed wiring which likes to develop ghosts for no goddamn reason. QC from the factory is terrible. The wood kits are sometimes beautiful.

I even tried to un-fuck one once. I thought "Naaah, they can't possibly be that bad plus I know what I'm doing!". Well, I did but I didn't. I built a great gearbox from the ground-up that ran like stink, but the rest of the gun literally fell apart in my hands over the course of a few re-assemblies and a handful of games.

TL/DR:
Really expensive wall hangers, can't be trusted like cheating spouse, impossible to get rid of like herpes
Seriously dude buy a CYMA.

Edit:
I've seen more recent lines and run inspection for an employer. They're still awful. The demo guns sent out by APS as promotional material to say "Sorry for all of that money you lost on our last product lineup" were lemons and failed out-of-box or shortly after. The problem isn't with their engineering or lineup, it's that their tooling, and materials composition in particular. There are better companies to share your money with.