It's somewhere between brilliant piece of art, and total piece of crapola. No really, it's quite good - but it isn't a terrifying tale of plagued out zombies of the apocalypse. It is more of a drama of the human condition and how the characters handle the apocalypse. It does have a real foreboding ambience, just a very grim feeling that death is the fait accompli, but it never really terrifies. I think I know how Charlie felt when he said he walked away feeling like it was missing something, although he liked it. A lot of people in the theatre were booing when it was over. I wasn't among them - I did like it, but it wasn't what they advertised per se, and I think a lot of people are going in expecting a different movie than what they are getting.