The location of the place is very nice: it is on the one hand outside of the noise of the city centre, on the other hand you can reach Termini in 10 minutes by train and they run twice or thrice an hour. The only disadvantage is that if you stay long in the city centre, you will need to go by the underground and then walk 20 minutes.
The hosts were very friendly and spoke English. Romolo's sister Anna explained me everything in the neighbourhood and was in every respect very kind and helpful. The only drawback of the apartment, which is nevertheless essential, is that the water stream in the toilet isn't strong enough: you will probably need to use water from a bucket...
Besides that the local landscape is very nice with a Parco d'Acquedotto in the direct neighbourhood and the apartment as a whole is perfect for those coming to Rome on a business trip.