Flat itself is quite big with high ceiling. Big windows let in plenty of natural light and a little balcony upstairs is lovely, great for enjoying coffee at the morning. I was travelling with my partner and we both loved the place.
Flat is located quite close to the downtown, where you have all the main attractions. Short walk of about 10/15 minutes and you are at the center and around 25/30 minutes from Boboli gardens.
Regarding the host, Massimo was great, we received plenty of tips and suggestions about the town, including different routes we could take to see different attractions, restaurants with amazing food. He was easy to contact with about any problems we encountered with a reply within a couple of minutes.
I would definitely recommend staying at this flat.