I was apprehensive of this track -- I couldn't imagine why they picked this one out of the various ones they had available and I of course wish they'd ported over the entire two-disc set from the UK so that we'd have gotten all four of them (the actors one interests me greatly). However, I was pleasantly surprised. Park Chan-Wook has plenty of interesting stories and compositional ideas to mention, while his companion, DP Jeong Jeong-Hun offers up surprisingly interesting and well-spoken thoughts about the lighting. Don't be fooled -- while this is a technical commentary on a rather visceral movie, it's actually very engaging and well-done.

Which is not to say I wouldn't still like that 2-disc set...

This is a highly technical commentary, as is expected coming from a cinematographer. The main focus is on the colors, lenses, and lighting that were used to create the visual style of Oldboy. If you are a fan of cinematography then this track will probably peak your interest. However I felt that the surface was only scratched on the topic. They discuss at great lengths the visual choices that were made but very little is described about why they made them (for instance, the largely green, purple, and amber color pallete). Nevertheless, they provided several satisfying technical tidbits that more than made up for it.

On a side note, the subtitles for the commentary track were considerably irritating. Whenever there was a pause in speaking the subtitles would revert back to the dialogue from the film. This lead to several moments of confusion.