>>280305513
It is legitimately a very good adaptation that is very respectful towards its source material, and the OST is incredible and elevates it significantly.
That said, some things are cut (mostly supplemental stuff about what characters on the surface are up to), there is a change made to a creature encounter on Layer 3, and the intro arc is ordered a little differently from how it's presented in the manga. Also the anime does not draw female nipples so you sometimes have Barbie dolls onscreen for a second or two.

>>280009145
>>280008874