It is very period accurate. The costumes even looked like they might have been sewn by hand. I’ve read a bit about witchcraft beliefs in the seventeenth century and the movie is like something straight out of a book or something. It’s just like what you read about. The language is spot on. And it really gives a good feeling for what it must have been like for people who came here from England in the early years. Their worldview is thoroughly fleshed out-- you get a vivid sense of how real and urgent their belief in God, Lucifer, heaven, hell, sin, etc. were, and the belief in witchcraft fits right in. The scariness doesn’t come from so much from conventional horror movie gimmicks and sheer gruesomeness, although there is some of that. The scariness comes from immersing yourself in the characters’ fear for their immortal souls while trying to hold their families together and survive in this lonely, isolated, terrifying environment. You also don’t see many films that deal with the high child and infant mortality rate of the time. I think this is a must-see for anyone interested in the early modern era, colonial America, and beliefs about witchcraft. The afterword at the end says that the story is based on a careful reading of many folktales, trials, and even novels of the era. Much of the dialogue is taken directly from those sources, they say.