I rated the movie okay.  It wasn't crummy, but still it was hardly worth it.  Mainly I guess just to see this particular telling of the classic story.  I understand the suspension of disbelief thing, but as Miraenda wrote in her review, there was too much that was just nonsense.  I have to disagree with Miraenda on the ending though.  That seemed to be the only good point in the whole movie... the idea that as humans we've built up immunities over millions of years to virus's and bacteria found on Earth... something no alien invader could possibly do.  On the flip side of that though, the idea that a completely alien lifeform would threatened by the same virus's that threaten humans is quite improbable.  Oh well.  Taken one scene at a time the movie was pretty good.  Put them all together in a movie and it was hardly worth seeing.