We spent a very good time at Sarah's apartment. I've been greatly welcomed by her mother who explained to me everything about the house. The apartment is well located, not so far from the train station (~10 min walk), and close to the Palazzo Pitti and the Ponte Vecchio! It's a bit long to walk to the nearest big supermarket but there is no problem with a car.
Anyway thank you Sarah, we really enjoyed our stay in your comfortable apartment!