Metella and her husband were friendly and efficient. We texted from the taxi leaving the airport, and Antonio was there to meet us as the cab pulled up. The departure was equally easy, with Metella kindly booking our taxi by phone.
It's a nice apartment in a great part of Trastevere. There are relaxed cafes, bars and restaurants within a minute's walk, so it's lively but without feeling part of the tourist industry. We would definitely recommend.