Francesca is honestly the best host one could have in Florence. She is so passionate about the city and explains EVERYTHING to you. Even though she thinks her English is bad, it's really good and she helps you plan your visits to all the amazing sites in Florence.
The apartment is located literally right next to the Duomo and within walking distance of pretty much all the major attractions in the area (the museums, duomos, bridges and restaurants). There's wifi and a washer which helped us plenty. The place is clean and Francesca keeps the place stocked with coffee, towels and everything else needed.
The apartment isn't large (but nothing in this area is) but the location more than makes up for it. There's a grocery store across the street and banks are within a block or two.