I can absolut recommend the apartment of Deborah.
It is in the center of all so you can reach everything by walk. The apartment is fully equipped and set up very modern. Deborah ist a superhost, answers questions very quick. She gave us a lot of helpful hints.
the best: The apartment had an nice terrace where you can sit, eat, drink and enjoy the Sicilian sun. :-)
When I come back to Palermo I would definite rebook Deborah´s place.