I saw this in the theater and for me it's one of those movies that gets better and better the more you think about it. Unlike the latest super hero movies it's one i'll actually remember in a few years.
I can't believe I gave it "only" an 8/10! I have plans to buy it on blu-ray when it comes out. My only real complaint is that at times it was rather slow going, but never boring.
I actually never liked Matthew McConaughey until I rewatched "Contact" nearly 4 times and also saw U-571 again. Don't get me started on "Contact"!
Watch "Take Shelter" if you can if you liked Mud. Same director.