plotwise it was really basic and nothing special but the acting, specifically Seo Ye Ji's, was AMAZING! the gore and the horror part were disgusting and even slightly funny/comical, but the fear coming out of SYJ's performance was incredible ;)

now the ending made me confused, did nothing really happen? her scars disappeared and that kinda makes it interesting, like she didn't go through everything just to make a movie (which I found ridiculous, writers/directors don't need to experience something to be able to covey real emotions, that's not how movie making works otherwise we'd be in an entertainmentless world full of psychopaths xD)
so that means she lived it -ie what we saw- while she made it up because she was so invested in the story, but her eyes flickering, did that mean she was possessed by the ghost? how much of it was real and how much wasn't?

the ost wasn't much and I never rewatch stuff