I almost rented that one today myself but decided to wait and see what others had to say about it. Stumpy, would you recommend a rental?
Save your money - I think you'd be disappointed and quite puzzled by a lot of the plot holes (and there are dozens), not to mention the much-less-than-satisfying ending. I figure in a few months, you'll be able to buy the disc for little or nothing.
In the meantime, you might want to read some of the viewer comments on the IMDB site. Though many are highly laudatory, there are just as many that trash it in no uncertain terms.
Like I said, it wasn't what I'd call a bad movie - I just don't understand how it won the Oscar for best picture. I guess the Hollyweird bigwigs figured it was the brothers' time.