This movie was quite surprising. Surprisingly good, as I would not have thought of such refreshing ideas in a horror movie, for this has become a true rarity in this genre. And it offers some really good and surprising twists, another rarity in the horror genre. There are some plotholes, sure, (who will cast the first stone?) but all in all this is a good and effective horror movie that focuses more on the characters than on jump scares and has a (most of the time) well-thought-out story. Its spirit positively reminded me of "El orfanato" and "El espinazo del diablo".