We arrived in Florence during very hot weather. The flat was advertised with air conditioning but that only was in the common room (living room) and did not cool the rest of the flat at all.
I wouldn't recommend this place if you needed the air conditioning. If it was a cooler time of the year, then it would be better.
However, there were some other issues to be noted:
1) The shower is a bathtub with a spout handle on a hose that doesn't reach the mounting point above your head. As such, you have to hold the spout the entire time you are in the shower.
2) Many of the light fixtures were missing light bulbs which made the apartment very dark in the evenings. An articulating desk lamp had been attached to the wall and the mounting bolts had nearly come out, making me wonder if the remaining bolts were going to hold it on or if it was going to come crashing down. Fortunately, there was no bulb in that lamp either.
3) There are two bedrooms with queen beds that will accommodate 4 people. While the listing claims there is a fold out in the couch, this is not suitable for adults and will only work for small children. Do not count on fitting 6 adults in this apartment.
Because we had two older children that decided not to get along, we couldn't put them into one of the queen beds.
The location was good and right next door to a fabulous restaurant that we have eaten at during our previous trip to Florence.
We spent a single night and then cancelled once we found a more accommodating apartment.
Would not recommend for large parties where a third bed is required. Would not recommend during hot weather where air conditioning is needed.