What is particularly unsettling about this film is the way it is shot: Cameraman documenting all happenings(mishappenings) from a first person perspective. The effect is chilling because this is not a movie in the conventional sense but a documentation of terror of unseen fatal supernatural phenomena:
There are no special effects, no CGI, no prancing translucent spirits or terrifying monsters; but just plain FEAR. I recommend this movie to Horror buffs out there because this is a classic when it comes to Hollywood Horror films.