If you are backpacking through Italy, this is an amazing option to stay in Florence. May be is no the largest room but is cozy, clean, and quiet, with enough space for your belongings.
The apartment is on a marvelous location, 30 seconds of walking and to I'll be looking to the Arno river, ad another 5 minutes walking and you would be in front of the main railway station. A lot of trattorias and other food places are a few blocks walking, also some of the beautiful chapels and famous Cathedrals here.
Ava is an excellent host, very helpful and responsive.
I totally recommend stay there for a wonderful time in Florence.