We stayed at Giovanni's place during a cold spell in Rome, so we bundled up for the trip. Everything about the place was great, from the car service we coordinated thru Giovanni to the restaurant recommendations.
The location was absolutely the best thing. It's literally around the corner from Trevi Fountain (45 second walk), but there is very little noise (there is some anywhere in Rome) from the streets. The unit is on the third floor, and the stairs are pretty easy to deal with if you pack lightly.
Giovanni's recommendations for restaurants were perfect - Colline Emiliane in particular - make a reservation though as we just got lucky to get in w/o one.
We've stayed in 6-8 AirBnbs over the past few years and this was by far the best experience of them all.