It is overall a very damn good detective (hope I spelled that one right) story. They got some new ideas and mixed them with some already present mystery/psycological shows.
All in all I really enjoyed the show but I had one big issue during the show. It was obvious starting from the 2. or 3. episode who the main culprit was and that with the knowledge that the cops had. So it was just a lets wait till they find it out even though it should have been obvious for a detective with super deduction skills. But there were still some other mysteris that stayed unkown till the end, so I was happy to look it till the end.
Overall I would give it a 9 but because of some obvious plots (the main culprit) I would give it a 8