What an incredible movie! I was just blown away by the quality, in part because the trailer really sucked (did they do it on purpose?)
I don't think I've ever seen special effects (or costumes?) at this caliber before. The aliens were so real that you felt like this movie could actually happen (and yeah, if you want to get technical, it did)
This movie will keep you engaged the whole time, make you upset at humanity, and hopefully have you realize that everyone should be treated equally-- even aliens.