I really wish there were more horror films like this one. It builds the mood terrifically, but we also get a payoff! It's beautifully shot with appropriately shadowy lighting. And most importantly, while the horror does get some explanation, it also retains some of its otherworldly mystery. That, to me, is the biggest failure of the American horror film, the incessant need to explain away every bit of terror thrown our way. Also, while you do eventually get to see the creatures tormenting the little girl, they are left in shadow for much of its running time and, once revealed, are still horrifying. In case you were wondering, there's no reason this should be rated R. While the opening is somewhat gruesome, it's not over-done, there's no sexual content, and no harsh language. What the movie does contain are some of the scariest moments in recent memory. I highly recommend this, and if you've got a kid who is 10+, take them with you. They'll love it.