I think a bit of virtue signalling has surfaced here...

Rating: 7/10 (18 February 2020)

Please stop with all this "best film ever made" rubbish. No one can see your profile, you're anonymous, it's pointless.
It's not bad. I have no idea how well its acted as I can't speak Korean. And I'm guessing, neither can most here. They could be hammy as heck for all I know.
It's quite original, and certainly well scripted. It's also a little far fetched. Well, a lot actually.
Listen, it is good. Is it gonna make you rethink "world cinema" (ridiculous term)? Not if it was never on your radar.