I'm ashamed to say I have only recently seen this film, I say ashamed as it has to be one of the greatest films I've ever seen. I've heard a lot of people saying its boring and confusing, but I don't think its either of those two things, not in the slightest. In a way its the perfect use of the film medium, the closest thing to a cinematic work of art I've ever seen. I can't think of a single negative thing to say about this film; the images, the music, the acting is (in my humble opinion) flawless.
I texted a mate to tell him I'd finally got around to watching it - he informed me it was an even greater experience when you watched it under the influence of mind altering drugs, but I suppose I'll have to take his word for that!