Pros: location is practical for day excursions (near the train station) and very close to the city center. AC is working very well. Wifi is very fast. Communication with Andrea or Miriam and Felice went smoothly and they were very quick to fix any issue we had.
Cons: as already written in the other comments, we found the flat to be very noisy (the street is leading to the train station and thus very crowded with people, cars and buses until late at night). The bed was not very comfortable in our opinion (when you're 2 it's very bouncy).
Overall, that's the perfect flat for a quick city trip to Florence.