Massimo's apartment was exactly what I was looking for during my stay in Palermo! I met Joe when I was checking in, who helped w/bags and had cold water/tea on hand for the hot trek up the stairs. So refreshing and the place was so cozy! I enjoyed listening to the bustling streets below while basking in the sun in privacy on the terrace. As for the bedrooms, bed was comfy and room was dark and cool w/room ac unit. (I kept the shutters closed during the day to keep it cooler in the apartment). Shower in the bathroom was small otherwise had great water pressure. As a solo female traveler I was a little concerned about the men that would stand around in the street near shops, however, none of the bothered me and by the end of the trip they became part of the scenery. I also experienced my first earthquake while sleeping here. It was a 4.3 and everything held up, Kudos to the architects, engineers, etc. ;)
Side notes: All the historic attractions are within 10-15 minutes walking. Train station was about 5 minutes walking as well. If getting dropped off, try to be dropped off at the end of the street nearest the train station, as the historic district does not allow traffic. I also recommend eating outside the historic district if you want "real" Sicilian food.
I will definitely be staying again w/Massimo. I really enjoyed having his apartment as home base for my first solo trip. HIGHLY recommended.