I didn't saw the anime yet but I read this one and I don't find it that good. Sorry for the ones who liked it, don't be mad at me.
Probably the reason is because as a big Shin Seiki Evangerion I keep putting it at the same level for comparison sake.
It wins in the drawing department, but that's not that hard if we see the original 1995 Anime. Not so much if we compare with the Rebuild, although is always the first when we talk about fanservice.
The story is not bad, but not as deep (at least in the Manga) as the Evangelion one is, although the premise of it is mostly the same, a flew control the world and steer said world to their godly desires of a higher achievement in terms of spirit, not looking to the way how they achieve such mean.
The ending is mehh, at least in the manga, with a lack of character development and their reasons for what they are what they are. Overall is kinda enjoyable but leaves a sour taste.
But I will not put it down until I see the Anime Adaptation, since the manga, as the Shin Seiki Evangelion Manga followed the "IF" route.