The greatest asset of the flat is definilety its location, right next to the Cathedral and the center yet quiet. Keep in mind that you cannot park directly below the apartment building, as it is a traffic restricted zone, but there is a parking lot about 8 minutes away on foot.
Gianluca was friendly, easy to talk to, gave us some tips and a turist map, and was flexible for check in - we arrived pretty late. The flat was clean, spacious, with a big table and comfortable bed. It has a nice private balcony, where we had breakfast, however the kitchen is quite basic and the bathroom a bit cold because of the high ceilings (but the water is hot, no worries about that). The first night the entire house was too cold actually, as the central heating was not turned on (we visited in the first days of January), but after speaking to Gianluca he came and helped us start/fix it and it became very warm and cosy.
Overall we enjoyed our stay and discovering the stunning city from this apartment.