ISee Icy Ice’s review published on Letterboxd:
"I Saw The Devil" is about an agent Kim Soo-Hyun, who embarks on a quest for revenge when his fiancée is brutally murdered by the psychopathic serial killer Jang Kyung-Chul.
This movie is one of my favorite thriller movies ever made and my favorite Korean movie of all time. Probably better than Parasite, which is of course the highest-rated Korean movie on LB, IMO. It gets fucked-up, really, really fucked up from start to finish. We see body parts, decapitation, r%#@, torture, someone brutally beating the fuck out, everything in this movie is extremely violent and disturbing, and it's very, very hard to watch.
The best part of this movie is the concept, I love the type of revenge that the protagonist is going for, when he finds the killer or see the killer's location on the protagonist's GPS, he doesn't kill him, but tortures him, set the killer free, repeat, and I think it's the best concept for a cat-and-mouse movie. Lee Byung-Hun, I seen most of his American films, he was very badass in two G.I Joe movies, the remake of "The Magnificent 7", and that crappy PG-13 Terminator film from 2015, but in this movie, his performance is fantastic, as well as Choi Min-Sik. The action sequences are realistic and intense, and the choreography is fucking incredible. The length, which is like 2 in a half hours, has no boring moments throughout the whole movie and once you watch this movie for the first time, it will make you entertained. The writing in this movie is wonderful with strong dialogue and well-written characters. Jee-woon's directing is amazing. And the cinematography and the color-palette are beautiful-looking. And the editing
Overall, "I Saw the Devil" is a gory and disturbing masterpiece that is obviously not for everyone and you can kinda enjoy this Spooktober.