The location is great, just 5 mins walk from the S Augustino metro station and 15 mins walk to Duomo.
Gianmaria is friendly and helped us with the directions of how to reach his place from the airport conveniently.
The house is clean and nicely done, perhaps a little small for four people.
During our stay, air conditioners in both the rooms were not in working order and it was terrible having to sleep in such heat without AC or fan. When we told the host about it, he arranged for two fans the next day (which was nice) but we had to assemble the fans ourselves after we were so tired of the sightseeing. It would have been great had the host checked that all amenities are in working order before the guests arrive, especially the essential ones like the AC.