We spent 3 days at Antonios place which is just absolutely recommended: A wonderful flat in an old palazzo in the old part of Palermo, with a nice terrace and a balcony, lovely furnishings, a well equipped kitchen. The pictures here in aribnb give a good impression - it is like that.
Antonio himself is a very good host, organizes transport from the airport if you wish and helps with recommendations for Palermo and Sicily - and doesnt bother you with anything else. The really only negative thing you can say about the flat is that the beds are pretty hard.