Perhaps there's another thread for this, but I've had a different kind of terrible experience with multiplayer.

Playing Co-Op with someone else on my LAN, we weren't able to get far before the game became nearly completely unsynced. Actions that I took would take seconds or more to be reflected on the other PC. Additionally, dialog boxes and loot boxes would take seconds to open up and seconds to proceed from one option to the next.

Initially, all was fine, but by the time we got to encounter the Elf (that you can invite to the part) I do not remember her name, sorry, the entire experience was ruined by the desync.