The pacing is good, the suspense is maintained throughout the movie. The story doesn't really make sense or explain itself, it's basically "a thing is out there, avoid the thing". It makes up for the nonsense and played-out story by doing a good job of building suspense and tension, maintaining it through critical moments, and then the release. I had ideas about how it was going to end but was never quite sure, so points to them for not making it easy to predict. The ending was not satisfying to me. It's definitely worth watching but they really lost focus and forced in an ending that was neither satisfying nor did it seem like it really belonged.