Our stay with Richard and Luisa was one of our best Airbnb stays. They are awesome hosts-- friendly, helpful and very organized. One night we were invited to dine with them and we enjoyed it very much.
The room itself is equipped with a microwave, a refrigerator and attached washroom, so a completely private setup. Though a bit far from the center, the place is well connected. Duomo is 25 mins by a direct tram. Metro is a 15 min walk, also reachable quickly by tram/bus.
Definitely recommended!