Raffaele was a great host, very welcoming, helpful and punctual. The apartment is really nice, clean and comfortable, ideal also for medium-long stays (unfortunately we spent only two days). The terrace is amazing, with an incredible view of the Duomo. Even better it's the location no more than 30 meters from the Duomo, 10 minutes by walk from the Central Station and really close to the main tourist sites.
Just a little remark. The first night there were a lot of mosquitos, I've killed at least 10 of them; I know it is a typical Florence issue but maybe it could be solved leaving in the apartment a mosquito repellent or lamp.
Other little issue is that the room, in spite of its new fixtures, and even if don't look directly on to the street, was quite noisy. But this is the price to pay for staying in the very center of the city and obviously Cristina and Raffaele have no blame of it.
Overall we had a great stay and I would recommend this flat an their kindly hosts.