Serena's house is truly special. First of all, special is its location. You come to the modern part of the city of Florence - which means that there is public transport (tram, busses) nearby (or convenient access by your car), also there are supermarkets nearby. Than you discover that in that modern area, part of a small old street with typical southern double-storey houses, cozy little courtyards have survived. There is even an old lady in neighborhood who likes to take care of order and safety in that backyard.
In a word, you get a very convenient and fast (from 10 to 20 min) tram connection to the Old Town and to the railway station. (It is especially important if you want to go to other cities of Tuscany - San Gimignano, Pisa, Luca for example - for one day trip.) And when you return in the evening, you find a cozy, very Italian setting, a quiet street. Serena's small house is both exotically old-fashioned and has today obligatory amenities.
I must definitely add that Serena is one of the best hostesses I have ever encountered. She constantly, but especially tactfully and subtly, took care of our well-being. We received very clear links, a lot of useful tips that help to explore Florence comfortably, even a pleasant and unexpected surprise - a bottle of Chianti left at the door one evening. (The neighbor old lady was waiting at the gates with the message, so we wouldn't miss that bottle!). If I ever come to Florence, I will want to stay at Serena's house again. - -