Naz & Michele are extremely nice and welcoming. they both know Italian and English, which should be very convenient to the majority of travelers. Naz was very helpful and showed me how to get my bus tickets.
Their place is about a 10 minute walk west of Ponte Vecchio ( and a couple minutes further to the Uffizi), about 12 minutes south of the train station, maybe 15-20 minutes walk from the Duomo, and a tiny bit further to the Galleria Academia. If it's very hot, the walks might be a bit difficult, but when the weather's nice, it's very pleasant.
The A/C unit cools the room down nicely. Bathroom was great, bed was comfortable. They let me use their laundry machine and clothes drying rack which was convenient. Check in and all communications were very clear and efficient. Will definitely stay again!