Patrick's place is outstanding—I'd go back there in a flash if I was in Edinburgh again. The location is ideal (I don't think you can get any more central than this) and the apartment is incredibly clean and tidy, even before you consider that the building is nearly three hundred years old.
Patrick is also a great host: very friendly and always ready to chat or give tips about the area, but also respectful of his guests' privacy. I really appreciated his attention to detail, and how comfortable and hospitable the rooms felt. Some of the little things (like a tea selection in the room) make a big difference!