5/5 and 0/5. Total score: 5/10.

Rating: Null/10 (9 September 2012)

Considering this is supposed to be a sci-fi/action film, I'll analyze those two parts separately.
Regarding Action: The movie is awesome. It does the job, and it does it well. It freaking delivers. Not the best I've seen, but freaking good.
Regarding Science Fiction: There's neither. It doesn't have any science at all, and the scarce science it has, is just so wrong it's not even funny. It doesn't have fiction either. Fiction implies there is a story. There is none. I can't consciously categorize this as science fiction. I think the right definition is more like religious delirium.
The whole movie doesn't make sense. It's Alien all over again, but without the incredible atmosphere of the Alien franchise, and with a fake, inconsistent xenomporph. And for some reason the entire crew of the prometheus, including the scientists, are the most mentally unstable people you will ever meet. I think they only recruited scientologists.
When I say there's no story, I mean it. The characters nor their actions make any kind of sens.
And when I say the science is wrong, I'm talking about instantaneous out-of-the-box carbon-dating an unknown life-form in an unknown environment in an unknown natural satellite that happens to have an atmosphere very rich in C02, messing up speeds and distances, incredibly advanced automated medical procedures that close wounds with metallic staples, androids with no apparent power source (as its body and head continue to work independently after being separated), animals that grow 50 times their size literally creating matter out of thin air, etc.
The movie is enjoyable, to a point, but if you are a science fiction fan, it'll drive you crazy.
And the religious overtones will drive you mad.