The room looks okay, but there are a lot of details to improve :
The bed is made with uncomfortable springs and is split in two mattresses. The toilet does some bubbly noises, and I hit my head 3 times on the door of the bathroom (I'm 6 foot 1m80 tall).
If you want to use the air conditionning or the refrigerator, you have to plug them first.
The worst thing is the smell in the hall whe' you open the main door, I think it's from the asian food place next door but it smells like rotten fried broccoli or something...
We were left waiting outside in the rain for the check-in, as no one was answering the messages, untill someone opened the door for us. Then we asked the lady at the first floor and she told us that she was not Maria, you have to go across the street at hotel Kattie's house on the first floor to find her (How are you supposed to know that ?).
Maria speaks only Italian, which can be tricky, she is nice and will just show you the room with no more informations.
the place itself is in a central location, right in a busy street.
Florence is a beautifull and expansive city, but I would recommend to find a better place to stay if possible.