Massimo was incredibly responsive to all my questions prior to our arrival. It was helpful that he arranged a driver from the airport to the apartment (via a hotel to pick up the keys). The cost of this was EUR45. The apartment was a bit smaller than we had anticipated and certain parts of the bathroom were not entirely clean. The shower did not drain properly.
The apartment was very centrally located by Trevi Fountain (which is currently under construction) and within walking distance to most of the main attractions. Massimo gave us great restaurant and gelato recommendations. He also welcomed us with a cake and wine.