My parents stayed in Walter's apartment in January 2014. They highly recommend the apartment. It is spacious, very clean and comfortable. There is all necessary equipment. The internet connection is excellent. Walter is very nice - it is pleasure to communicate with him.
The apartment is in the historic center of Florence. Everything worth visiting is within 15 minutes walk or closer. Ponte Veccio is 1 min walk. Also a very nice supermarket is close to the apartment. My parents traveled to other Italian cities (Venice, Siena etc.) by railway from Santa Maria Novella station which is 15 minutes walk from the apartment.