I cannot imagine a better airbnb in Florence. the location is absolutely perfect and the view is to die for. It's the top floor of an old palazzo on the second most popular square in the city. it's just steps to the Uffizi Galleries and a few blocks to the Duomo to the north and the Pobte Vecchio to the south.
The only small warning is if you have a hard time with stairs. The elevator goes to the 4th floor but you need to go up one more flight to the apartment by stair. This is a luxury in Florence as most places are all stairs.
You must book this if it's available!