About the apartment, and the location : everything you read in the reviews is true. It is a great location and a really nice apartment. With an outside temperature of 35+ degrees, especially the airco was nice !
About Giulio : he is really easy to contact. I shared our arrival time, which actually was quite early in the morning, with him the day before we left and he made every effort to meet us at our arrival time and check us in. Very nice of him , it saved us walking around with our backpacks for a couple of hours in the heat of the day as normal check-in time is 15:00.
He also bought us a "survival kit" , so we had some food and drinks and showed us around the apartment. He explained how the espresso machine worked and left us cups for in the machine, and the espresso was very good ! He answered all questions we had about the neighbourhood , places to eat, places we really needed to see, public transportation, supermarket etc etc. He made us really feel welcome and during the next days of our stay, he was always available for questions. For me, a truly wonderful host and we really enjoyed our stay in Rome !