It was okay, but I have to confess I didn't always understand what was going on - when I did, it became kinda predictable though :P

The "fright level" was just fine (not boringly low, but not too high to give you nightmares either), the acting was good, the ending of the last episode leaves the door opened to a possible 2nd season. If it is to be continued, I'd watch it to have better closure (I'd really like to see a happy ending for Nai, the character deserves much more than what he got in these 14 episodes), but a rewatch is not likely.