Maurizio's house is located perfectly, just next to the Teatro Massimo and really close not only to the sightseeing-must-sees, but also some essential food stops in New City. Because of that, don't be surprised to hear outside noise especially during the weekends, even at night, as Palermo's drivers like to put the music on superloud.
The flat is spacious, has some really pretty, old-style furniture and looks to have been recently renovated. The necessary household things are mostly in place, though you may have to buy one or two things. There's also an Italian socket adapter with the hair dryer, so you may not worry about plugging in your laptop.
We didn't have a chance to meet Maurizio, because Marilia greeted us with a friend. It's better to know Italian (or French ;)), but she shows you everything there is to know about the flat. She also gives you the map with the indicated places to eat, which is nice. It was a good Airbnb experience.