The manga is good up until about volume 10 or so after which point it nosedives hard in a way that retroactively ruins a lot of the cool dungeon ecology stuff from the earlier parts. The anime, or at least what I've seen of it so far, is a faithful 1:1 adaptation of the manga - it's impressive in that it's a good adaptation, but kind of disappointing in quality compared to Studio Trigger's own original series like Kill la Kill, BNA, or Edgerunners.