I thought that the commentary track was very informative and interesting. However much of what Koepp says is repeated in the featurettes included on the disc.

While Koepp is not a household name yet I do hope he will be one day. He has not directed many films but has written many really good ones with at least 2 very good directors. DePalma and Spielberg. Both of which he gives thanks to in this interesting and informative commentary.

While Koepp does reiterate what is seen throughout the featurette it is all worth a listen. He expounds on Depp (and the rest of the cast) and how he processes all the material first then fine tunes his performances with slight mannerisms or "ticks". Koepp liked that Depp was never afraid to "be afraid". Other cool little insights include how Depp chose certain novels for the set of the cabin, digital blends in certain long shots, the use of mirrors as a gateway to different realities, the window being a direct metaphor for Depp's madness.

He does give props to Glass for his eerie score, the old dog Chico (who is half blind)and the ILM team for letting him use some cut visual plates of rocks from Spielberg's The Lost World. This is the second commentary by Keopp I have heard in recent days and I look forward to future commentaries by him. First and foremost he IS a screenplay writer and admits that writers are boring. I'll take his word for it.

Koepp spends a good portion of the commentary discussing the nuts and bolts of filmmaking. He goes into detail about how certain scenes were shot and why. He explains why he used specific angles and colour schemes and their desired effects. Koepp also talks about how he wanted to emulate the films of Alfred Hitchcock and then brazenly comments that his shots “are so much more elaborate.” Too bad they aren’t nearly as effective as anything in Hitchcock’s filmography.

this commentary was very technical about filmmaking, filming, editing and stuff I thought, nonetheless interesting to watch and I actually enjoyed the movie better with the commentary, I thought the movie wasn't that great.
koepp is an engaging speaker and his commentary made me appreciate the movie further than the story, which was challenging to adapt to the screen.