Well. It was surprising. I didn't wait that when I started to watch this. Like, I was confused while whole thing and all I was thinking was "What's going on?". And I think that was what made it good. Creepily good.

About ratings:
Story: Unique. If you guess what will happen next, you're a magician.
Acting/Cast: A little felt that something was missing but that can be only because of my bewilderment. Good acting.
Music: I actually didn't concentrate in it because so much was going on but I can say, it brought atmosphere.
Rewatch Value: I just don't watch series twice.
Overall: I don't really know what I think about this. But maybe YOU should give it a try.
At least about one thing I'm sure; you won't be bored.