Giorgio is kind, polite and very helpful; the advice he gave us about what to do and where to go in and around Palermo was quite to the point; the only time we had a technical problem (with the WiFi), he resolved it rapidly and efficiently; he organised our transfer from and back to the airport, clearly cheaper than a taxi would have been.
The apartment is new, clean, very well equipped, and spacious, situated in the middle of an old part of the town (don't expect a fancy neighbourhood). It is situated on the first floor, with a lift to bring you there. It takes a 5 to 10 minutes walk to go to the main streets, shops, market etc.
We spent a very nice week in the apartment and we can fully recommend it.