I personally don't like this kind of movies where my questions don't get answered in a logical way. Even in the end when supposedly all is fine and happy a lot of questions remain. What is the evil thing? Where did it came from? Why isn't the shelter attacked by it or the worshippers? How all those people survive in there without supplies?
Don't understand all the hype about such a weak movie, so similar to "The happening" it could be considered a plagiarism.