An amazing space in an incredible location, with a great host. This location is the perfect union of the heart of Trastevere and also easy access to central Rome. For Trastevere, there's a wine bar literally on the ground floor of the building, and all the restaurants of the area are within a few (flat/non-hilly) blocks. Crossing the bridge and finding the Colosseum, Pantheon, and everything else as also an easy walk, no need for public transport.
Roberto was very communicative, had great recommendations for sights to see, routes through the city to optimize my time, and local restaurants to try.
Additionally, I was a solo female traveler and the apartment felt incredibly safe. Outdoors is a well traveled neighborhood so it wasn't sketchy to get into (day and night), and the locks/protection were comfortingly great. Roberto himself was also incredibly helpful, kind, and helped ensure things were secure.
The apartment was exactly as pictured--in a bustling area but high enough to quiet the sound. I would stay here again in a heartbeat.