We were two people and found the apartment more spacious than expected. There is a large open plan kitchen and dining area which acts as the hub of the apartment. Nice big table is useful. The bedroom is generous and the bathroom well equipped. Climb up to the second floor is interesting - a narrow stone spiral staircase that looks like it belongs in a Medieval castle.
The location is perfect - easy walk across the river to Trastevere for dinner and the Campo de Fiore market is just minutes away. Recommend having lunch at one of the pavement cafes on the square while watching the crowds at the bustling market. There is a Coop in the little square at the end of the street where you will find most of your immediate needs. Piazza Navona about a fifteen minute walk away. We walked to the Vatican, Colosseum, Trevi Fountain, Spanish Steps, Pantheon etc all pretty close by. We also walked to the 4th Century monastery or basilica of Santi Quattro Coronati to listen to the nuns sing Vespers at 6pm. This is something beautiful to experience, but take a cab.
Ask Eva about directions to a good and free viewsite over the Forum.
You can't go to Rome without visiting the Vatican, but if you are going for the first time be warned about the crowds - tens of thousands on any given day. After many hours we eventually made it into the Cappella Sistina to be met by what looked like 500 people milling and jostling around and as we turned to look at the great Last Judgement wall a voice boomed out, "Avanti, avanti, keep moving, no photo, no video, quiet please, silenzio, silenzio, keep moving!" Thats how it was. But the old cobbled streets of Rome are beautiful and even more so at night.