As others have written I, too, was a bit hesitant about watching this movie, having read previous reviews. I have to say I really don't know what movie the nay-sayers watched. This movie was excellent! Tense, great acting, great, well paced action. It didn't have to depend on cg or big name actors. The love that the soldiers feel for one another is delivered flawlessly. I've been a fan of science fiction for most of my life. Having said that in the 40+ years that I've been watching Science Fiction I place this movie right at the top of the "Invasion" genre.
If you trust nothing else I say in this review, which I also will say is the first I've ever written, it is that you shouldn't trust the negative reviews and watch the film for yourself.
Review by joeandtata from the Internet Movie Database.