Not worst movie ever, good camera work, but an iffy story, weak ending.
For people wondering why many rag on it on here, check the reviews. Generally pretty poor.
Some aspects were well done, particularly the cinematography. Some of the acting was pretty decent.
Script/story was just a little weak/clichéd. And the ending was annoying/abrupt. (If the darkness has been released, and is that all-powerful, does it really need to trick and kill people one-by-one? "Cabin in the Woods" was horrible, but it at least implied a more rapid cataclysm.)