I definitely got a lot of playtime out of this one, between the large number of conversations, map sizes, quests and support/skill unlocks. Even now I'm pretty sure I might have missed some content, getting constantly lost on the first floor as I did.
It was understandably a bit buggy given the scope, mostly noticeably with some of the 2F battles and tile shenanigans. Never anything game-breaking or that couldn't be very easily bypassed, though. Encounters could still be quite frequent, often triggering multiple times in a row, which made the Sublimate skill a real lifesaver given the large maze layout.
One of the highlights for me that hasn't been mentioned so far was the classrooms. On top of all the endearing NPCs, I liked how all the classrooms had unique seat layouts and features. Very handy while navigating, and I was really impressed how distinctive they could be despite mostly using the same props, in contrast to the corridors.