I just watched it, and I found it genuinely frightening, if a bit too bleak to just be good, scary fun. It is nicely layered, though, in terms of story, and the two principal actors, mother and child, are excellent. The child in particular impressed me. As offputting as the character is at times (yes, he is an annoying, frustrating child), it's an intense, unaffected performance that brings to mind a child exposed to or suffering from severe mental illness. It definitely needs to sink it, but I'm tempted to say that it's one of the stronger recent horror movies - easily better than Sinister and The Conjuring.