It Follows is a horror film that deviates from many common horror movie tropes, but its main plot device, that a curse can be passed on through sexual intercourse, is weak and comes across as preachy. The twist that the curse can be reversed by killing the current carrier adds an element of tension, but the lack of explanation for the central villain, an entity that slowly stalks its victims, adds an eerie sense of mystery. The film's setting and props create a sense of confusion about the time period, but the performances of the cast are solid. The ending is ambiguous and raises more questions... read the rest.