We stayed here for a month and had a lovely time. Gianfranco and Cinzia are wonderful hosts - so helpful and accommodating. Gianfranco offered us tours of the city, and was just a message away if we had questions or needs. Many wonderful places to eat and shop just down the street (We really loved Cafe Madeleine and Cantina del Gelato). We were just across the river from all the majors sites in the historical center of Florence, but staying in Oltrarno gave us a bit of space to breathe after long days in the bustling city center. We were a 20 minute walk from the train station (S.M. Novella) and hopped many trains around Italy - to Milan, Como, Venice, Rome, Pisa and Sienna.
The only thing I would say is that laundry is available here, but keep in mind it can only be used between 9 am and 9 pm. Just a heads up as that took some configuring since we stayed for so long.
We highly recommend staying here with such great hosts!