We had an *incredible* stay at Silvia's place.
Silvia is a host, not merely an Airbnb proprietor; she took care that our check in was smooth, she communicated easily and regularly, and she gave us wonderful tips for nearby.
Most importantly, the location is simply unbeatable: 3-4 minutes to the Duomo, 6 minutes to the Uffizi, similar to the Ponte Vecchio, 2 to Bargello, 10 to the Accademia. Great little food shops and supermarkets nearby, so you can make use of the small kitchen to make food or bring it home.
The apartment itself is cozy and clean -- it feels indeed like it's someone's place, not a hotel room. Bedroom has AC, which is great when it's 35C outside. Lots of steps coming up, as the listing notes, but this also provides some isolation from the street below.
In sum, a terrific option for able-bodied people looking to take advantage of the best Florence has to offer. We hope to be back.