When it comes to screenplay Park Chan-Wook is unique (at least for western standards) in his way of filming. The colours are so vivid and it seems like he wanted every shot to be a piece of art. One tip: If you like the shooting in 'Oldboy', have a look at 'Sympathy for Lady Vengeance', the third part in Park's revenge-trilogy. It's even superior to the camera-work in 'Oldboy'. Don't, however, expect a story like Oldboy's, because you would be very disappointed.
When it comes to acting and the music, this film is also one of the better films ever made. The music sticks in your head and every time I put in my Oldboy-DVD and the theme-song comes up, I'm just flooded with good memories (even though the plot doesn't have a single reason to be happy about). The characters are also presented very well by the outstanding cast. Especially Choi Min-Sik and Yu Ji-Tae set a very convincing performance.
I really appreciate this film being respected as it should be, by having a place in the top 250. If, however, it was up to me it would be even higher in the ranking. I don't see why films like 'The Usual Suspects' or 'Memento', which are fantastic pieces of film-making and which without a doubt deserve a place in the top 250, are higher in the top 250 than 'Oldboy'. They serve the same cause; a fantastic plot. But those plots can't stand in the shadow or even come close to the plot of 'Oldboy'. The one and only reason is that those two films are better known and from a western production company. If we were all living in Asia, no doubt 'Oldboy' would be in the top 20 of all time.
My advice to people who haven't watched this film yet: Go see it! This is definitely a must- see. If you have a weak stomach, pull yourself together and still watch it. Don't be as shallow as a lot of people here tend to be. Look beyond the violence and see the things I mentioned before: world class acting, cinematography, music and last but certainly not least the plot. Once you've opened yourself up you'll find a whole new world of cinema. Enjoy!