Location, location, location. This apartment is great and it's in the centre of it all - comfortable walking distance from the Colosseum, the Vatican and the main sites of Rome. Although you don't need to go far. You barely need to leave the beautiful street. Try Frigidarium ice-creams across the road from the apartment (there will be a queue), a cinnamon mojito at Fluid cocktail bar a few doors down or come out the apartment, turn left and left again for the most amazing paninis at a little street food cafe.
Andrea was great at communicating with us pre-arrival so we knew exactly what we were doing. We were very happy we chose to stay here and would recommend to other travelers.
Just FYI. The modern, clean and comfortable flat is on 2nd floor and no lift.