My parents and I had a lovely stay at Marianna and Monica's place. It was easy to get to from Villa Costanza bus station and the city centre - there is a tram stop less than five minutes away. Otherwise it's an easy 20 - 30 minute walk (depending on your pace) to the Duomo. A supermarket is also minutes away. The apartment was well-equipped. It even came stocked with some basic food stuff, which was super handy because we arrived late on a Sunday when the supermarket had closed. The only thing was the WiFi was super slow and worked on and off.