Arianna & Michele's place is a beautiful flat with 5 rooms. Our room was big enough for the three of us. Alessandra, the person who welcomed us, was very kind and told us everything we needed to know.
It takes about 12 min to reach the metro on foot. There is also a really good "gelateria" down the apartment :)
There was no air conditioning in the flat unfortunately and it was really hot in Roma when we were there.
But we enjoyed our stay still.