Surprisingly astonishing.
I take note that this review is many months post release and it has been many weeks since it's many awards.
I will say that it is indeed deserving and for good reason; it is a thrill ride but not like any thriller when it baits you to encourage the Kim's family plan only let go midway and then present with what's really going on.
The writing of the script gives many tie-ins from the beginning to the end of the film. The Kim and the Hoon family both take serious advantage of the Park's but it is palpable who is the actual "Parasite" in the end.
There's a lot of necessary junk to fuel the plot and character dynamics, these will be very obvious. without withdrawing spoilers, nothing could be said.