We stayed at Carlo's apartment the last week of July. It is located in a quiet residential area of Trastevere, with Bus 75 literally outside the front entrance...which takes you to and from Termini Train Station (not to mention right by the Collessum). Carlo was a great host and offered to make arrangements for car transfer from FCO airport, but we were arriving by train from Venice.
He met us at the apartment and we were very happy to see that the pictures and description did match the unit. Actually, we were more than happy, as it was a cute and charming apartment. It was quite clean and bright with all required amenities and toiletries and even a bottle of Prosecco. Carlo was very kind and helpful in getting us familiar with the unit and had quite a bit of info on navigating the transit system and all the popular tourist attractions. Along with some good places to eat. And in Trastevere, there were many...within walking distance! We felt quite safe walking home late at night (usually after midnight) with our 2 teenage daughters.
We would definitely recommend, Carlo's lovely apartment!