My OH brought this a few weeks ago after his boss recommended it's one of those films you've got to see! The main language is French although you can alter than in your DVD Player/Blu-Ray settings so it's dubbed in English - like I did! 
To me, this film was very surreal and in some parts didn't make sense to me so I plan to watch it again sometime. I could also imagine it would sound better in French with English subtitles so I could get a better sense of the characters. 
Probably not for everyone, but still pretty good!
boredrich
I often have trouble following dubbed films it deters from the film doesnt it