The chilling effect of this movie is very prominent right from the start, setting the threat at the closest person you could ever trust in the most unbelievable way. The acting performances are of course top notch in order to achieve that, even the snoring act was designed precisely to elevate the creepiness of the situation. The storyline buildup was good, the ending though could be better, as the tension control at the end was a little off balance. The way it handles its logical sense was technically ignored as the characters sleep in, and audiences should do the same.