We had a wonderful two weeks in Rome. We walked everywhere; the apartment is so centrally located that we really learned the roads and left feeling like a Roman because we could navigate the streets so well. Our hosts were very attentive and the apartment was stocked with all the essentials, breakfast, and even a welcome bottle of wine. Campo dei Fiori is a "hopping place" especially over the weekend, but the triple pane windows really made the apartment quiet and private. There is air conditioning too that was very powerful and was easily able to make the apartment almost too cold, if you wanted it that way.
There were great restaurants nearby and we found many especially in Testavere. Also, if you jog and don't want to chance tripping on Rome's cobblestone streets, many people were walking, running & biking along the paved path under the nearby bridge along the Tiber River. It was very cool!