What a great apartment, would highly recommend it to anyone! As someone who has previously lived in Florence I was very happy with Stefano's apartment, it is in a great location (very close to the Arno river and Santa Trinita bridge), great fitout and furnishings and the building has a lift (this is a true rarity in the old buildings of Florence and you will appreciate this when you think about taking your luggage up many flights of stairs in old medieval buildings.
Armando was great help at check in and throughout the stay.
5 stars from me.