We absolutely loved this place. You can't get anymore central than this, with 20 minutes walk to Vatican, Trastevere, Monti, Forum Romanum and all the churches, museums and piazzas contained within this radius.
It is a stone throw from the piazza Navona, and situated in the Ponte district, which is a lovely, less touristy, quaint neighborhood - we loved strolling up and down the via dei Coronari and The via del Governo Vecchio. Triple A location!
The apartment itself is really cosy and very bright (even in midst of winter) with lots of natural light. It has not 1 but 2 terraces that you can enter from the living room and kitchen, making it feel like one big amazing living space.
Diana is very friendly and was very quick to respond to any questions we had. Great service.
Bottomline - 10/10 would recommend to anyone.