As it's been said, it doesn't quite live up to the hype. At the start I kinda enjoyed it, it had a good start even though it looked a bit rushed to me.
Then it got really worse, I can't even understand what is trying to tell neither what end will we face. Otosaka doesn't even develope, he is just splitted into 10+ different characters that go by his same name. In the first episode I didn't knew if I liked him or not, he looked like the typical smug meme and his ability made him a Lelouch copycat (i.e. the OP gesture), but for the time being I can really say that I dislike him.
I think Maeda went full retarded when writing backgrounds for every character, since even the mains don't quite get you. I liked Nao at first, now I can't even stand here and I feel pretty bad about it, since she's dubbed by Ayaneru and she looked good AT FIRST.
Honestly, I think Maeda was just trying to pull off something new for the fans, something new that would still recall old series everyone love, and he failed; maybe the hype did something bad to his head. But compare this thing to a project like Angel Beats! is pure heresy. The only thing you can appreciate is P.A. Works' job that deliveres always good things in term of animation and the OST, that is not 10+, but is likeable and really fits the scenes.
