We've spent 2 nights there as a family of 4. The apartment is great, there is everything you need for a short stay, it's spacious, has comfortable beds and that ceiling...
The apartment is in the best possible place in Palermo, it's in the middle of everything there, with the main street just beneath you.
Giulia is a great host, she greeted us at the apartment, gave some local recommendation and helped with parking and understanding rules around ZTL (permit that you need to buy if you drive into the center of Palermo.