The opening... 8 minutes are incredible, and the closing 10 are good, but a solid 18 minutes don't make a 2hr film decent.
The film feels like two completely different scripts smashed together, tonally its all over the place and I found it difficult to follow, but there is some amazing camerawork in there and great creative ideas that I'm sure will spurn equally more inventive pieces in the future of korean cinema..
and that fight soundtrack as well...
director: "so I want you to watch the shots, and just smash a gong every 2 seconds in rhythm"
gong assistant: "CAN DO!"