wow ... it is great that you have seen the film and like it ...

apparently, it was touted a "surprise" win becos many audience/critics (before the announcement of the awards) did not really like it ... claiming that it has not much plot and is too slow for comfort ... 

i have not seen it ... and i will try to catch it ...

PS: By the way, do you know that the poster was intentionally designed to look like one of the currency denomination in China?