A point of view of someone who loves mystery movies:

So, today I re-watched this movie and I loved it more than the first time. I am surprised that the rating is that low, but well, I know that I will definitely re-watch it because it’s my cup of tea. If you love mystery with a few scary parts (that still gives you chills), I recommend you to watch it.

STORY: Firstly, do not read summaries, because you will think that this is a classic horror movie. It is not. There is more mystery to it. I think that the writers did an awesome job. You will think, "Ah, so that happened"...not.

ACTING/CAST: The characters were complicated to act and the actors did quite well. It is hard to choose a favorite one. So let me tell you like that. Kim Ji Suk's, Park Jin Joo's, and Ra Mi Ran's characters were those ones that expressed more feelings. Park Han Byul's character was difficult to act because she needed to be very mysterious, but maybe she could act even more mysterious.

MUSIC (SOUND EFFECTS): Rarely used, but right timing.

RE-WATCHING VALUE: Because it is so well written and because it is a mystery, makes me wanna re-watch it all over and over again.

So this is it. I would like to apologize for my poorly written review, but at least now we have one.