My wife and I stayed at Carmelo's place for 1 night on our journey from Germany to Rome.
Carmelo is a very good host, very friendly and offered us a lot of local tips and also some breakfast, food and coffee. He went the extra mile to communicate with us and confirm our booking even though there were technical problems with Airbnb.
The accommodation was just as expected, a double bed in a room in Carmelo's apartment. The cleanliness could be slightly better as we felt the room and the sheets smelled damp. On the plus side there is an AC in the room which would definitely help in the Milan summers. The bathroom and the kitchen are shared with the host and other guests.
There is no private parking, only some street parking. We were lucky to find parking when we had come there. The location is very good. There is a direct tram to the Duomo.
Overall a good experience. Definitely considerable for short stays.