Constanza and Vittoria are very nice and helpful, it was a pleasure to have met them. The house is in a castle, near everything, we walked to everywhere on feet, just took a taxi to the train station, but you can go by bus. The house is very clean, we got a nice wine as a gift, and there were all the basic stuff for cooking and washing clothes, including consumables, like salt, old, sugar, pepper, etc. The kitchen is really nice, and we used it for making breakfast and dinner. The beds were also very comfortable.
They provided us with very helpful tips about the city and gave us a map with indications of places of interest.
The only point that wasn't perfect was that it was hot in Florence, and the house doesn't have air conditioning. I don't complain about this though, because I knew it in advance, and they provided us with three fans, so it was not so bad. To make it short, we loved to stay in this house, and we recommend it to anyone.