This is one of the greatest series that ever created, and very simply there is no words to describe the peace of art in this anime. It's amazingly beautiful, incredibly smart, and very thriller. There is no talk about the animations as drawing and characters, as the Japaneses anime is very known, amusing and attractive. But the story is incredible, i just sit and watched the whole series one time, an episode after the other, because you just can't stop. I'm addicted to movies and series, where smart and intelligent tweaks dominant the story, and this is the case here, the complexity, the smartness, the intelligence and the events are very amazing. I recommend this anime for everyone who's searching for a brain teaser, and who likes brain tweaks and tricks. It really deserves 10. Good luck watching it.