Do not get this disk. Get the Lions Gate release (available for $9.99 on Amazon.com)
I ordered this disc after having read very positive reviews about the transfer and the extras. Consequently, I was quite surprised, and disappointed, when I received the disc, to discover that it had no extras whatsoever (not even a menu!) and that the video quality was barely similar to that of a scaled un SD DVD, that is, soft and muddy. Major let down!
What I hadn't realized was that the reviews I had read were about the american Lions Gate release of the film, and that the only version available on Amazon.ca was the slightly older (6 months) Alliance release. What contributed to my confusion was that both releases feature exactly the same artwork (except for tiny french title on the canadian one).
If you'd like to see the difference in quality between both transfers, you may compare eloquent screen captures of both releases at http://www.dvdbeaver.com/film2/DVDReviews44/requiem_for_a_dream_blu-ray.htm
One point to note for my fellow francophones, however, is that the american transfer does not feature a french-dubbed track, nor french subtitles.
Hoping this helps... Now, I'm just about to ask Amazon.ca for my first refund ever...