Had a few days in Rome with my husband and 8 year old and the flat was perfect. Lots of room, everything you could need, funky design, good wifi, comfy bed and sofabed, Francesca was so helpful and we really liked the local area especially the restaurant literally across the street, Retro! and the icecream shop, Milky!
Bus 170 into the centre was frequent and easy to navigate once we'd worked out how to buy tickets in the local Tabacci! Also easy to return from Termini or Piazza Venezia. We also found the regional train from Trastavere a good way to get to St Peters as well as the airport. A great flat and a great base for exploring Rome.