I took a look at MAL and Youtube a bit, and I may have to check it out just to see because the reviews looked so polarized.
I see it's a mecha series, which I'm usually not into because I'm bad at visualizing fight scenes, but I have watched a few mecha anime. I see this did get an anime but was incomplete. And the manga people had a lot of critiques about the ending, implying it threw away tons of character development, sounding like the Game of Thrones ending, but other still talked like this series is amazing.
The Netflix S1 trailer didn't do too much for me other than make it seem like an Evangelion thing, but then I clicked on a video of a fight scene, and holy heck that monster looked so disturbing and insane, I shut it off because I didn't want spoilers. I think I'm going to have to at least check out a few episodes to see how I feel.