Great flat, my boyfriend and I had an amazing time.
Luca was very helpful and available during our stay, and the location is absolutely incredible. From the flat, you can walk to the castle Saint angelo, but also the Trevi fountain, the Piazza Navona or the Vatican. If you like walking, the Coliseum is also within your reach, or taxis from the nearby stations will get you there quickly and for a cheap price.
This is a flat I definitely recommend!