Better than I expected
The jump scares are predictable but effective. The obscure lighting and brief glimpses of freaky mutants are old hat but scary. The ending is kind of silly but sort of awesome, too.
The characters aren't very likable. They do some really stupid stuff and scream way too much. Plus, they don't even get "good deaths." They just disappear.
Overall, though, it's an entertaining movie. The camera work is surprisingly competent, in a hand-held, lost footage sort of way (the movie is not billed as lost footage but it still has that feel).