Nothing too crazy. I just asked that you run your dishes in the dishwasher and pick up after yourself. You can leave the keys on the kitchen counter and leave the door unlocked when you check out.
Very spacious, well decorated, comfy beds & couch, lots of privacy, quiet, just lovely. Only big drawback was that it was not clean, but he's hiring a new cleaning company, so that should be taken care of for the next guests.