We stayed with our family with two young kids (7 and 10)at this very nice apartment during Christmas. The apartment is modern, large and very comfortable. It is in Trastevere, close to nice bars, cafés and restaurants and next to stops of tramlines 3 and 8, so very convenient to get to from the airport and into the city.
Our host Ekaterina was very helpful in all aspects of our stay, made clear how to get there, was punctual on check in even though it meant a slightly later Christmas lunch for her, and gave us lots of tips to explore the city and the local neighborhood.
The apartment is up a couple of stairs, so you need to be fit enough to climb them, but that wasn't an issue for our family.
Overall highly recommended, we would stay there again if in Rome.