Carmine provided very concise directions to his place.
The room was big and spacious with a huge window that looked out over the Mercato Centrale and the leather market. I loved waking up and smelling the leather although I had to keep the window closed at night to prevent mosquitoes from coming in.
I hardly saw the other guests (there are two other rooms I think) and didn't have to wait to use the shared toilet.
It's perfect for travelers because it's only 5 mins from SMN Firenze station. At Mercato Centrale, look for the stall selling skewered burrata and cherry tomatoes for 2 euros. The lady looks like Mary Steenburgen.