I didn't know anything about this film, until I put it on the rental list at random.
The opening scene has (the only) two guys driving on a desert highway, in which the camera faithfully follows the car, speeding up to it, slowing down, watching the landscape go by, with some outstanding minimalist music by Arvo Part in the background, and this lasts for about 5-7 minutes. Suffice it to say that if you don't like this scene, don't bother watching it.
I did carry on watching, and am so happy I did. Watching these guys situation go from mildly diverting, to "Okay, what now?", and then to hopeless despair, the film totally hypnotises you. The parts of the film that most people thought were tedious, were some of the most compelling to watch. The scene where they're walking at a snail's pace, with the sun slowly rising, and the brilliant, haunting piano music behind it, was so eerie, so beautiful, I actually shivered. (Some will no doubt be in conversation with the Sandman by now. Their loss.)
After watching this film, I was totally drained, and I will not forget it for a long time.
Note: If you enjoyed Gus van Sant's 'Elephant', you will probably like this too. Hope this helps.xx