The apartment was clean and as described. It is just 2 blocks from the Vatican and close to the metro (2 blocks from a bus stop, about a 10 minute walk to train). Guglielmo was quick to answer questions and the provided tablet was extremely helpful, used as a wifi hotspot throughout the day which can certainly be a money-saver for some. Although specified beforehand in the description, I am unsure why the city tax needed to be paid in person and not through the AirBnB app, but perhaps this is a policy in Italy? The bathroom sink had an issue when we arrived, but Guglielmo had somebody come to fix it within 2 days - which was not a disturbance for us. One of the bikes that were offered for us to use was unfortunately too loose at the handle-bar to use. Although this was not a deal breaker for us, it did force us to pay an extra €14 rent bikes at a rental shop to ride down Apia Antica.
The apartment is cozy and beautiful, on a very quiet street. The amenities provided were beyond our expectations and Guglielmo even connected us with a friend of his who brought us to and from the airport for less than the cost of a taxi. His friend even became our wonderful unofficial guide to Rome, offering many suggestions which helped shape our planning.
Overall, it was a worthy and recommended experience.