Roberto's apartment was amazing! It was very spacious and nicely decorated. It has all the things you will think of and more. We spent five days there and it has been like home to us. Another couple was also staying in the other room but it didn't felt crowded at all.
The location is great also. The first day we found it very easily (Roberto gave us great directions) and the other days we went to the city centre by walking, it is about 20 minutes, but you can use bus number 1,1a or 1b and it will leave you in front of the building.
We will definitely come back if we have a chance. Florence and the apartment are worth for it.