It was so well planned, executed and directed. I had read the script (it's been on-line for a long time) and wondered how they hell they managed to spend $50m on it (Ewan McGreggor doesn't cost that much) but now I see where it went. I feel kinda bad for it though; it's such a unusual movie, and they obviously had no idea how to market it, so so far it has made very little money.
Definitely worth checking out, just be of open mind.