My boyfriend and I enjoyed our stay at Imperial78. The rooms looked exactly like the pictures, they were cleaned daily and air-conditioned, which was important to us given the sweltering Roman August heat, and the location was perfect (a beautiful main avenue with plenty of trees and shade, close to the city center, shops, bars and restaurants, with several bus and trams stops conveniently just outside the apartment building, and a few train stations in the neighborhood or close by for easy trips to the seaside and reaching the Fiumicino airport). We were welcomed warmly by Dexter, who manages the place / acts as concierge. We never actually met or saw Valerio the airbnb host, but Dexter was there to check us in and provide a great service, as he could be found at the front desk throughout our stay to help out and answer any questions. We also loved our simple breakfasts at a bar/pastry shop/luncheon a few blocks down the road.
However, we did experience noise from outside the room sometimes. We were upgraded to Room III because our room wasn't available for the first three nights of our stay - which was great as it was bigger and had a jacuzzi in the middle of the room - but this wing of the B&B overlooked the somewhat busy street, so trams could be heard (and felt, as the building shakes a little when they pass by :)), especially in the evenings/at night. The windows *are* double glass and have screens and curtains, so those who are not light sleepers may not mind. When we eventually got moved to the room we originally booked, overlooking a lovely garden, our remaining 5 nights were quieter, but this room (No. VII) is next door to the storage room, so again there was some noise in the morning from house-keeping. As this B&B is actually a ground-floor apartment converted into 7 hotel-like rooms with a little common area/foyer and concierge desk, guests would go up and down the hallway in the mornings and stop to ask Dexter questions or recommendations or chat with him loudly. In short, don't expect to sleep in (as one likes to when on vacation :))
The occasional noise was also our only issue with Imperial78, everything else was satisfactory. It is great value for money and we have already recommended it to our friends.