We enjoyed our stay in Gianni apartment. It is really nice and detailed decorated, well equipped, everything is new and clean.
We visited the Ballaro market just around the corner every morning for fresh products for our breakfast, like freshly squeezed orange and pomegranate juice, ricotta, bread, vegetables, prawns, etc. It was great. Gianni also gave as a lot of advice on local places to eat.
The apartment is located in the middle of the Old town, just a few minutes walk to main pedestrian street.
The first night was quite freezing in the apartment, due to unexpected cold weather conditions in Palermo and ventilation after previous guests. There are heaters (and air conditioning) in the living room and kitchen, but I wish there were also some heaters in the bedrooms. Next days weather get warmer, so the rooms and it was comfortable stay.
I recommend Gianni apartment for your stay in the heart of Palermo. Gianni is thoughtful host taking care of his apartment and his guests!