The set up seems to be straight from how to make a horror film for Dummies and at first glance seems quite groanworthy and hardly worth the bother.
That would be a mistake. The film is a well made, convincingly acted and compulsively watchable little thriller that delivers in style.
With this and the excellent Oculus, Flanagan is a director whose future films will definitely be on my watch list.
Thanks for the heads up, Shawn.