This is not for everyone for many reasons. I thought it was creepy and shocking to the point of total surprise on what I was watching. The way it is filmed will make people think its "slow paced" or "boring" to me it was correct. It was making you get into the minds of these characters and how their thought process was actually working. If you are looking for a thrilling and exciting show this is not it. If you are looking for your mind to be messed with and brilliant acting from the villain, then watch this. This is the type of show were your secretly rooting for the killer and you can't understand why, because he gets into your head...just like these woman. I would say this is a rating of 8.5 or 8 but nothing lower. Do not watch if you don't like vaguer sexual talk or sexual content, this was a shocking show that had lots of it and blew my mind since most Korean shows do not have this type of content, I also think this is why people are rating it lower.