Federico was very accommodating. We arrived around 2330 and he waited for us to check in (and still showed us where to go on the map). The flat was small but it was clean and comfortable for two people. Kitchen and fridge was stocked with goodies. The location is convenient where you could hop on the 8 (tram) to Venezia station (walking distance to most attractions in Rome). Supermarket, bakery and tobacco shop (to purchase bus tickets/roma pass) are all minutes away from the flat.
Highly recommended!