The room is on the ground floor and the window opens to the corridor. It's slightly gloomy. The landlady warned that there was her garage outside the wall (behind the wall) and that we should not be frightened when she come and took her bike. But we didn't hear it. At night and early morning you can distinctly hear the sound of the water in the bathroom above you.
So it is good for staing just for night if you are short of money. And may be it's much better than hostel, but I didn't have a chanse to compare. But
Walking about Florence we didn't meet any not expensive hotels, only 4*, 5*, and a hostel on the other side of the river. So may be it's a real problem for the tourist in the city.
Taking into account also the cost of cleaning, the site's services and the request to sort the garbage the room was not cheaper than the hotel. So I would choose a hotel next time.