Viola saved our trip!
We made a reservation with another host on AirBNB at the first place but he had some emergency so that he couldn't host us. But we weren't informed until the time we were going to check-in. So we had to make last minute reservation with other host on AirBNB. After getting turned down by a couple hosts, Viola was very kind to accept our reservation even she wasn't in Florence that day. Her mother, Wally, helped us check-in at 22:00. She's a very kind lady.
We enjoy the apartment a lot. It is located right across Palazzo Pitti, within 10 to 15 min walk to Pointe Vecchio and Galleria Uffizi. We spent most of our days just walking around the city. The apartment is very comfortable and beautiful. We definitely will stay at this place for our future visit. And we are very grateful that Viola can host us in such a short time.