The PERFECT location. You could throw a rock out the window and hit the Duomo, which if you don't know Florence, the Duomo is the center of the city with everything in very easy access right around it.
My family of 4 stayed a full month in July, and I have no regrets. If/when we return to Florence, I will try to book this location if at all possible. The place is exactly as the AirBnB description and pictures show. It's nicely decorated, like staying at a family home. The beds are super comfortable (better than mine at home) and there's an A/C unit dedicated to the main bedroom. There's plenty of wardrobe space for clothes, and lots of extra sheets and blankets if needed.
The apartment has a nice open floor plan with a large (newly renovated) kitchen through the door on one end, and the dining and living room in the main open area. The ceiling in the main area is about 20 feet / 7 meters up, and there's a stair case to a loft bedroom over the living room side of the main space. The long wall of that space faces the road (you're on the top floor) and there are very tall windows that you can open for fresh air, people watching, or just staring at the Duomo. The inside wall of the main area has a hallway to the main bedroom, which has a dedicated bathroom and a window to the inner open part of the building (good lighting being on the top floor.) The kitchen area is large enough to easily cook for a large family and have people coming in and out to get drinks from the fridge. At the time we stayed, the kitchen had been remodeled and there were all new top of the line appliances. This worked great for us, since we were cooking meals most nights. Last but not least, there is a dedicated laundry room over the kitchen.
Getting back to location ... you are in easy walking distance of hundreds of places to eat, and more museums than you can count. The walk to the river and the famous bridges is about 5 minutes. There's a small grocery store across the street. ... I really can't say enough about how perfect a location this is. Also, the downtown area is very safe. The kids and I got into a habit of "midnight gelato" where about 11:30 we'd walk down the block to Davinci's or to this great little shop on the corner by the Duomo... so good. I miss it already.
And one last thing about location... the main train station is within walking distance of the apartment, but if you have luggage, I suggest catching a taxi. There's a stand right by the Duomo and its about 7 euro to go to the train station. Florence is on the high speed train route. You can get to Rome in 1.5 hours and to Milan in 4. Thinking of flying in/out of Milan? There's a train station IN the Milan airport.
Hope this helps future travelers, and thank you for sharing your place with us for the summer.