Well done. Maybe Stephen Hawking was right, shoot first ask questions later ...just jokin. This felt authentic, of course you ask how can an invasion from aliens feel authentic. It was in the visuals largely where the quality of this film comes from. Great panoramic computer generated scenes from the sky of battlegrounds, interesting machinery and there are alot of both, then the focus comes down to earth and engages the unit to where you as the audience are vicariously given a boots on the ground perspective as if you were ...in there. The makers of ths film also covered that you empathized with the characters fates by developing them early and throughout. This film sounded great too. If you like explosions and gunfire any DTS theater sound systems woofers will shake it. I don't particularly prefer gunfire and explosions but this was visceral and had my nervous system on edge non stop. I and you realize any extra terrestrial intelligence that had the technology to get here from anywhere further than the dark side of the moon would have the technology to kick our asses up and down Earth. Aside from that little inconvenience the film was, for its genre, well done.