I gave this 4 stars because it has a lot of interesting themes many here have already mentioned. From the domestic violence, to sexuality and many of the taboos therein. Outside of the gore I really would not call this horror so much as I would science fiction.<br /><br />It's bleak, depressing and hopeless. While I don't mind a less than cheery ending, I'm really very tired of the "humans suck" cliché that's central to every movie. I know you can't get a liberal arts degree today without bowing to the alter of self-hatred as a member of the human race, but how's 'bout as a writer/director we pretend we are different than everyone else in the pack and notice that the ALIENS KILLING THE HUMAN RACE are evil! Right now, if you are reading this and believe that humanity deserves to die, just go out, find a lake and swim 'til your arms are tired. This way you won't be around to direct the next film or write the next book telling me I deserve to die for being alive. It's silly, not thoughtful, and boring.