I've loved horror for 30 years now, ever since I saw Night of the Living Dead (my favorite horror film) when I was 7. It gave me nightmares that night that I still remember vividly. And I know ever since the late 90's, we've gotten 3 or 4 big studio boilerplate horror movies per year that were "the scariest movie since The Exorcist" that don't even stick with you til you get out of the theater. But I will say with the utmost confidence, this is the MOST PERFECT horror film since Kubrick's The Shining in 1980.

Incredibly, this film DOES NOT rely on lame, interchangeable JUMP SCARES! Every single big budget horror movie since that girl's face in the closet in The Ring has been 70% jump scares, with atmosphere, story, acting, etc all crammed into the remaining 30% of the film...

((Think about the definition of a jump scare"... The score drops out and you get 3-5 seconds of total silence, then something appears really fast and the score comes back in twice as loud... That's not "scary", it's just "startling". If someone jumps out at you from around a corner, do you feel "terror" and "frightened" the rest of the day? No. Your heart only beats fast because it was unexpected and jarring.))

...This film is infinitely more cerebral and atmospheric. The "horror" comes from the situation, the tension, the atmosphere, the stakes, etc as it's supposed to, not just from things popping up behind characters (strangely, where only the audience can see), so all that credit goes to directors Danny & Michael Philippou for having a vision of a wholly original horror film and implementing it perfectly.

The acting, also, really sells the story as well because the characters are realistic and have distinct personalities, not just two-dimensional static cut-outs. Sophie Wilde, specifically, deserves notice because she's the reason that you get so drawn in to what's happening on the screen... Her non-verbal acting is incredible, being able to convey such a wide array of emotions and feelings just by slight changes in her facial expressions.

Giving anymore details than what's already in the trailer would be ruining (in my opinion) the absolute best horror film of the last 43 years, so

I will just point out, when the ratings on IMDB are all either 2-3/10 or 9-10/10, you can guarantee it's going to be great if you're a fan of creative, original concepts with thought put into them, rather than "the #1 movie in America thrill ride feel good coming of age comedy of the summer holiday season" that's out this week because all the reviewers giving low scores most likely want to see more Hangover or Annabelle or Fast & Furious or whatever turd Kevin Hart and Adam Sandler are dropping this month... You know, people that "don't wanna haveta think too much"...