The first thing i want to say is that i would like to meet whoever wrote this. This is the #17 ranked show for a reason. The story was just so well thought out is what it comes down to. I've read other reviews where people said that they thought it was too slow and stuff like that but every episode pretty much was a cliffhanger that made me want to see what happens next.
Pretty much the top way that i judge how i will rate a series is by how quickly i watch it and i blew through this one. I don't know how other people watch shows but i'm usually using megavideo and i would be using that to the max and then when i hit the time limit that almost adds in another cliffhanger because i literally have to stop watching and megavideo is pro and stopping in right in the middle of a crucial dialogue which leaves you both angry at the arbitrary amount of time they give you to watch (sometimes it will be 72 minutes and then other times it will be like 54) but all around this was just a great well thought out show.
For those of you who have seen code geass (i'm not sure which came out first) but they are both similar with the way that they control others to advance their master plans, but yeah definitely an amazing show that i highly recommend. Although i was upset at the end but it was probably the best way to have ended it.