We were a group of 6 people and had more than enough space at Alessandro's home! While we did not meet him, Pamela, who checked us in, was absolutely wonderful. She was very helpful and showed us everything we needed to know about the apartment. The location is unbeatable. There are several delicious restaurants in the piazza below the apartment, and the view from the courtyard side of the building is lovely. All major tourist sites are walkable from the flat. The beds were all very comfortable, they provided a good supply of towels, body wash, soap etc., and the kitchen is fully stocked. (The dishwasher was a major plus!) I have lived in Europe for almost three years, and as an American, this flat felt like a palace compared to some of the cramped, tiny hotels that are around. 10/10 would recommend this place to large families, or groups! Grazie mille, Alessandro!
It is good to note that this flat is located on the 4th floor of the building and the elevator is very small, so be mindful of luggage!