Having stayed at airbnbs in Palermo for seven summers now, I can safely say that Antonio's apartment was the best I had stayed at. The building is well maintained, the apartment is well furnished for 1 or 2 and has full amenities (good internet, effective air conditioner, larger water boiler). The kitchen unit is well stocked for a one bedroom apartment in the center.
The best part is the location, though. Well positioned between a number of important areas of the city center. For the price, I was very satisfied.