A block from Piazza Barberini, steps from the metro. The photos and description are exactly accurate. I walked to the Forum, and I really too the subway to the Vatican. Close to Spanish steps and Trevi. I enjoyed the 15 minute walk to Roma Termini, since I commuted to a nearby town.
The flat is small, but fine for one or two. Kitchen has everything you need, and a grocery is across the Piazza. It is not quiet in the middle of Rome, but it did not bother me at all.