just finished it yesterday after playing for 3+ years in coop with a friend... we kinda rushed the dialogues, but the story looks interesting.
we also killed everyone we could and may have broke a side quest or two.

if you're playing with an undead be mindful of where you are when messing with your equipment: people might get uneasy about seeing through your bones.
or do it when you want to know who's really with you or not