Great stay in Florence at Chiara's place.
The location is great, you can walk to all Duomo in 10 minutes, the leather market and the central market is 3 min walking from the apartment.
The apartment is perfect too, it's superb, clean and spacious! Chiara is a a great host and provided me with maps and many great advices on restaurants and coffee, she also helped guide me to book my train to Rome as well.
Overall great experience and 5 star is totally not overrated!
Only one small note for other travellers is Florence in December can be quite cold, the apartment can be a bit cold at night as it uses the central heating. It seems to be the normal case in Florence as it is the same situation with another apartment that my friends stay in, so if you are from a tropical country and not used to the European winter, make sure to wear warm pj at night. (Notes that Chiara's place has extra blanket too, so you can also use it!)