It was a horror movie for me. The plot was different and interesting. The Story was great. After watching it, I was scared to make a sound for some time. I was just immersed into it from the entry of that thing. It was never boring. The acting was fantastic. The background music fits perfectly. Even with rare dialogues, it was so engaging. It proved that the Story, it's presentation and acting are needed more than anything else. Overall it's a great movie and I regret not watching it In theaters.
NOTE: It's only my thoughts and if you don't agree then it's fine. Calm down, world isn't ending.