Viero and Flavio Broos are really nice brothers. The communication was excellent and they willingly answered all our questions. They even bought umbrellas for us, because it seemed it would be raining 
The apartment is big enough and really clean. We were there in August and although the temperature was very high, inside was good temperature overall. It is because of good positioning of the apartment. Another big advantage is location. It is really only a few minutes from Colosseum and another favourite places (Foro Romano, Palatino, Piazza Venezia, etc.) by foot. In close neighbourhood you have everything you need (supermarket, restaurants, etc.). The price is excellent for such service. We really recommend this place.