I, like many, was hooked after the first 4 episodes. Hooked enough to watch the first season in 3 days. By far the 'question' arcs make for a better season then 'answer' arcs so the 2nd season took me a lot longer to watch but as a whole it definetly was a '... wow' moment at the end. Im hoping Rei can live up to the darkness of the series like people are speculating it will.