Although Marzio was on holiday and he himself couldn't pick us up, his son instead was the host --- and he did a wonderful job. Marzio's son picked us up in the evening after we walked around a bit in the shopping mall near the airport. The apartment was big and clean - and refreshing after walking outside in the hot weather (it was not too cold, not too hot inside). The location is good -- it's only 25 minutes walk to the train station and only 15 minutes to the city center. It is also pretty near a recommended restaurant: La Caprese! The apartment is near the stairs to Citta Alta (walk north towards the "wall" and you'll see the steep stairs to Citta Alta. Marzio brought us back to the airport when the time arrived free of charge! He's friendly, helpful! Would have been even better to know him even better --- but that's for our next visit :)
Tiny advice: be ware when you go out eating in a restaurant. You'll pay copperto no matter what. Copperto is the service fee. It ranges from 2 to 3 euro per person. In case you get optionals like bread, drinks/alcoholic beverages (like free wine when you arrive La Caprese) -- take it! You will have to pay Copperto either way :) Cheers! :)