Vittorio is really responsive, making the stay a lot more pleasant.
The smart lock also make check in time flexible, which is a great plus! But make sure you'll have either phone connection (or we called via Skype with our own wifi), because that will be required for unlocking the home for the first time.
The description of the apartment is accurate. Vittorio is very thorough in his descriptions. It is slightly stuffy to start with, but there are fans and ventilation machine which helped make it better. My family and I felt fine inside the house. (we visited in Aug). But don't expect air conditioning style cooling.
The location is also very good! Walkable to the Vatican as well as the Pantheon. Downside is there are no metro stops close by, so we mainly went on foot or with a bus (e.g. To the Colosseum). It's definitely a nice tranquil area that is slightly away from the touristy noisy areas. The wine bar right below the building was a hidden germ that my parents loves!