I found this film to be an absolute masterpiece.
This is Korean cinema at its finest from the fantastic acting to the tense ridden musical score.
The film is basically ambition blinding people from doing their job and not caring about the consequences of their actions.
Films like this are the reason I love watching world cinema especially Korean,and not that Hollywood garbage that gets churned out like a machine.
The tension created by the ominous score and superb camerawork is genius.
Another review complained about the phone ringing sequence...I thought that was the best scene and had to rewind it twice! Look at the paranoia that ringtone represents and what's going on around him do to him.
This is a modern Korean classic and a must see for everyone!