Even though we didn't meet Massimo he was always available to answer to our questions, Massimo kindly recommended us a taxi driver who picked us up and dropped us off to the airport. Our stay at Massimo's apartment was great, the apartment was very clean and located in the center of Rome, next to the beautiful Fontana di Trevi, we were able to walk everywhere from there. At night gets loud as the fountain attracts a lot of tourist crowd but we were not bothered by it as we live in New York. The apartment it's small but it had everything we needed for our stay: AC, small kitchen, fridge, clean bathroom and comfortable bed.
Be aware that WI-Fi will cost you extra € as it is not free.