One side effect of the family reunion is that every evening after retiring, I watched at least one episode of Sh15uya. Sunday I finished the series. At the end of the last episode, I feared that they were going to go for the stark, bleak ending. Small spoiler: it ended 'happy'. All told, I liked this series quite a lot. Twelve episodes was just about perfect. Some repetition, but mostly in the service of the story.
I really enjoyed the role of Piece (yes, that's the correct name), the 'supernatural' executioner who reaps the 'broken' 15-year olds in Shibuya 15. He was played by Mark Fulenwider (stage name Mark Musashi), who made no effort to erase his Western pronunciation of the random Japanese proverbs they had him spouting during battle. It was a chuckle every time he appeared. (Just search YouTube for 'Mark Musashi' for some interesting demo tapes).