We stayed here for just over a week in August and had quite a lovely time.
The rooms are spacious and comfortable and the en suite bathrooms with showers have quite a luxurious feel.
The kitchen has an electric stove, which is an absolute asset in hot Italian weather (should you wish to cook), as gas stoves seem to be the more common option. Every individual room has its own AC unit, as well as its own junction box. There is one TV per room and plenty of sitting nooks.
The flat is about 15 to 20 minutes of a walk away from the inner city.
There is a bus stop nearby, however, in fact the bus from the city (6B) stops only a few metres away. The stop into the city is a bit trickier to find, but well worth it. You can be at the train station within 6 minutes.
The host is very accommodating, whenever we had any questions, we never had to wait long for a reply. We were welcomed warmly, despite arriving pretty late at night.
Definitely consider this flat for your stay in Florence!