The flat is located in a very calm and nice place, near Piazza della Signoria (2 minutes by foot).
The flat is extremely spacious (2 bathrooms, 2 bedrooms, 1 dinning room/kitchen) and is well furnished (the heating system is great for example). We were given a warm welcome!
This is definitely a flat I would recommand to anyone willling to stay in downtown Firenze.
The only drawbacks concern the dampness and the lack of airings.
Still, this flat was one of the elements that turned our italian trip into an unforgettable trip!