We loved our stay here and would stay again if we ever came back to Florence. The location was perfect. It was easy to find and walk to from the train station, the duomo is literally just down the road. There are shops/markets/supermarket all close by. We didn't take any public transport and walked everywhere, it was great. We went for the shared bathroom option but also having our own sink in our room which I would suggest if you are going for the shared bathroom option. The room was big and very clean. The shared bathroom was clean and didn't really have to wait much for it to be available.
After reading the reviews we were prepared to expect: no wifi (we had data on our phone anyway), no air con but there is a fan which was fine for us (we stayed in August and it was hot), lots of stairs to get up and take your suitcase, 1am curfew, no tv but we were hardly there, some noise from the street but to be expected being that close in the city, you have to pay cash and hand the keys to her when you leave each day but we found this safe, they have cameras around as well so felt safe being here. I'd recommend this place!