I'd say best place to stay for young people. The square right under the terrace is full of people and music, the view is magnificent and everything is very close.
Alberto is a great host, we were always in touch abd he provided a bunch of usefull recomendations on what to do and where to go, to have a great time.
The noise outside is not a problem, as great earplugs are included as well as a card for free coffee in a nearby cafee.
It was really sad to leave the place, as we stayed only for one night. If ever again in Palermo, will defenetly stay here again.