Overall, this is a very good place to say. I'll start with the pluses and then finish off with the few but important shortcommings.
LOCATION: Doesn't get any better. Right across from Pitti Palace. Just steps from Ponte Vecchio. Only a few minutes from Cupola del Brunelleschi (Center of Florence). 6 minutes to Uffizi Gallery. Plenty of stores, restaurants, Gelato joints within a 5 minute walk radius. Just a few minutes away from the station for Bus No. 11 which will take you straight to and from the central train station.
ROOMS: 3 bedrooms (1 large, 1 moderate, 1 small). Living area has a sofa-bed.
BATHROOMS: Only one bathroom is really large enough to shower in. The other two are extremely tiny. Your back is against that wall as you use the sink in two of them. Showers in these two are a foot and a half wide. Not suitable for bigger individuals. The Third bathroom is large with an in-ground tub for showering and was the one we all used to shower.
AMENITIES: Enough linen and towels. Toiletries were OK. Kitchen has ample utensils the flying pan was old and very sticky. Needs to be replaced. Washer/dryer available.
WIFI: Available but quite inconsistent.
HOST: Extremely professional. Host and delegates were super prompt to response. We had an electric issue (see below) and they send an electrician the very next morning. Annie answered all questions promptly. One of the best hosts in my ABNB experience.
Now the negatives:
COOLING: ACs were very inefficient. We were a bit unlucky to be here in the middle of the record heatwave so this may not be an issue rest of the year. But we had a lot of trouble the first night. We asked for extra pedestal fans and the host brought in three more fans (in addition to the few already there) the very next morning.
ELECTRIC SYSTEM: The power tripped at least 10 times during our 3 night stay. We were told it "could" happen but it happened a lot. And it wasn't necessarily with using all AC units. The water kettle, or the washer would trip it too. I understand these are older buildings are the wiring may be not be adequate to meet current needs but this issue can be a problem.
CENTRAL GLASS ROOM: In the middle of the apartment, there is an open "out door" area which looks like an "indoor patio" in the photos. But in the summer, this is a thermal reactor. The AC outlets open here and the place is at hot as a sauna. The head radiates form the glass walls into the apartment, particularly the kitchen/dining area, and the hallways and take the little efficiency the ACs have, away form them. There really should be a solution for this as these heatwaves are not going away and will there during peak tourism season. On the plus side, its perfect to dry your laundry quickly :)
DECOR: Quite poor. Large old bulky random furniture laying around taking up space. With the amount of money quests pay for this place, the look can be easily upgraded.
SUMMARY: Outstanding host, perfect location. Very poor cooling. Tiny bathrooms. Will still recommend for less hot months and average and smaller built individuals.