I stayed with my family (3 adults and a 6-month baby) in this apartment for an entire month and we loved it. We stayed there as the Covid pandemic still affected Italy (and elsewhere) and we found the apartment extra clean. In fact, for a small extra fee the hosts even agreed to have the apartment clean again in the middle of our stay there.
The hosts were always very available and their responses always timely, which we particularly appreciated because we had a baby with us.
The apartment location is outstanding, because of its closeness to both downtown Florence and the train station Santa Maria Novella. We literally only walked 3min with our luggage to the apartment from the train. Some reviews mention the noise in the street, which was true, but after a few nights one gets used to it. We found that was just the typical noise one listens to in the downtown areas of major European cities, where there is always activity down in the street, with people talking, the trams passing and the church bells ringing (the latter you will always find all across Florence, though). The apartment had both A/C and heating, the heating being very convenient for us, since we stayed there for the month of February.