We had a wonderful stay at Sumiyo's apartment. We came in later than expected because of a delayed flight but Sumiyo was there to welcome us. The apartment is very clean, practical and nicely decorated. It's just a short 5 minutes walk to Ponte Vecchio and the center of town. It was just a little noisy in the morning but Sumiyo had warned us that there was some construction work going on. I highly recommend staying there.