The location of this apartment is fantastic!
The entire city was walkable (for us) from this location- we didn't use public transport once and the Spanish Steps, Roman Forum/Colosseum, and Vatican were each under a 40 minute walk, with Trevi Fountain and the Pantheon just over 20 minutes away.
The supermarket is close and there are TONS of restaurants nearby (Ai Marmi is a pizza place nearby that was as tasty as it was entertaining to watch 30 pizzas be made at a time!). The neighborhood also felt very safe- we usually walked back from dinner between 10:00PM and midnight and were always comfortable doing so.
Finally, the little sun room was the perfect place to eat breakfast in the morning or relax with a glass of wine before dinner. We would definitely stay here again!