In its larger narrative stakes, there's not much new here: just trying to keep some morally-grey characters from being killed by a big beastie.
And in half of its smaller narrative moves, this regurgitates a slew of familiar cliches.
But, in the other half of its smaller narrative moves, Ellis presents fresh ideas and story moves with which (depressingly so many) other movies wouldn't bother.
So, all in all, I found this film to refreshingly rise above the pack of the vast majority of horror films these days.