When I read about it, I found it kinda silly. But ohh well. People have different tastes and I'm glad that you have enjoyed it.
The premise is indeed stupid, the movie is staged, shot and acted quite well though. 
Well if I do end up watching it it would probably still scare the shit out of me because I'm a massive coward when it comes to stuff like that.
Disclosure/minor spoiler but read it:
The movie has only I think two scenes with any gore at all! It's a movie about creepy atmosphere and dread, not torture porn or gross-out visuals. I think it shows only one dead body and that's it. This is coming from someone who thinks most modern horror movies are ridiculously stupid and I hate the masochistic 'torture' horror film variety that got popular the last ten years or so.
This is a smart movie with a great cast of teens who actually look and talk like teenagers, you will be surprised.
