We were very desappointed by the flat, particularly because of the dirt : hair on the floor, dust everywhere (very bad for allergic people like me), mildew on the shower and on the coffee maker...
The air conditioning system is so noisy that you have to chose between the noise or the warm temperature at night and it's impossible to sleep. There isn't hair dryer despite of the indications. The sound isolation isn't good either.
Moreover, there is a surprise city tax at the arrival that should be mentionned in the description (2,50€ per person and per night).
Regardless of all of this, the flat is very well located in the city so you can visit easily and have access to all the important sites of Florence. Sergio, the man who welcomed us, was very kind and made our arrival very nice.