Very nice apartment. It contains everything you need. Pictures on the walls, old (but good!) furniture make it warm and home-like. All facilities work perfect. The apartment is placed very close to historic center (7 mins by foot to Santa-Maria-del-Fiore), however, it is quiet inside.
Room is dark, because the only window looks into tiny yard, but it won't be a problem for people who explore Florence all day long.
Note, that the apartment is on the 4th flore without elevator.