Everyone either loves it or wants to kill J.J. Abrams, it's not a movie you can be in the middle about I guess...
I liked it a lot. Comparisons to 9/11 or other terrorist attacks are inevitable and pretty valid, really; if you were on the ground while this was happening, which is sort of where the movie tries to put you, then you wouldn't have a clue what was going on. And I think, if they had just focused on the monster the whole time, it would have been just another Godzilla....which would have made the whole thing pointless.