Now to the good things. First of all (which I would like to see in this type of genre) the human reaction, psychology. Going along with the characters I would assess that most human beings would have very similar reaction to the occurring events as the characters had (I just tried to put myself into that condition). I assume more panicking and irrationality could be observed but otherwise it's quite close. Second - the ending. I so hoped this will not be another Adventure type of ending where the good guys (humans) outwit the superior aliens with some random and very naive methods to win the grand finale. I was too pragmatic before I saw the last ten minutes of the film and still it ended on an awesome note. Not the way one usually expects it to end when watching alien or sci-fi movies.
I did not write a lot in this review (and I admit that's it quite messy in layout) as there's not that much to write. My advice - do not listen to critics and other people who told you that this movie is not worth spending your time. I am a person who likes very exceptional sci-fi movies. Even if I do I seek some realism in character reaction, behavior (the part where ''2012'' was disastrous). I was very, very skeptical before even considering to watch this film. Apparently I was completely wrong.
Though I know most of you have heard such inducing texts as well but I want to remind you - at times try to act not according to your expectations. If your mind and heart says that it's not worth the while then do the contrary - watch it for a change and see proof that your intuition and mind is wrong at times.