This is a great place to stay. It is about halfway between the Duomo and the Accademia, less than two minutes from either. The street has many restaurants, shops and a grocery store. All the major museums, churches and the SM Novella train station are within 15-20 minutes' walk. It would probably be faster to walk to and from the train station, rather than taxi, if your luggage has wheels. Very many people roll their luggage through Florence.
The host is clear, friendly, helpful and easy to contact. She met us in person, on arrival and departure. She responded quickly to questions sent via AirBnB.
The apartment has one flight of stairs (straight, no landing) from the ground floor entry. It is bigger than it looks in the photos. It is clean, nicely furnished and cheerful. Each bathroom has its own hot water heater. The bedrooms and bathrooms have individual heaters. There is an air conditioning unit, but we visited in November. There is strong WiFi. The beds are comfortable. The kitchen has basic utensils, tea pot, espresso pot, water boiler, plates, cups, glasses. There is a clothes washer in the kitchen area, portable drying racks, iron and board. Ask the host where they are. The host provided an assortment of teas, coffee, packaged pastries, sugar, condiments. There is a lot of print material about Florence. The host strongly recommended the Gelateria Vivoli, near Chiesa Santa Croce, and it certainly was the best we ever had.