I knew going into it that the show would be dark, despite the art style. I knew characters would die and that the big bad was right in front of us the whole time. I had no idea just how insane the show would be. It lulls you with the first two episodes, then the third episode slaps you in the face while kicking your crotch. Then you're lulled into a false sense of security again, just a little bit, and then all of a sudden you're on edge the entire time, anticipating and expecting the worst at every turn, and yet still somehow managing to be blown away by the ending.
I 100% percent recommend this show to everyone. Watching this show is like listening to a beautiful symphony played by a top tier orchestra. This show might actually be a way to get non-anime fans into anime.