Gessica's place is absolutely stunning. It was the nicest and most modern AirBnB I've ever been to in any country. It was clean, well-appointed, and spacious. It's perfectly located near Mercato Centrale, a 3 minute walk to the Duomo, and central to almost everything. The neighborhood is safe and lively without being too cramped like most areas of central Florence. The terrace is surprisingly quiet and provides an excellent getaway from the energy of the neighborhood.
Gessica was a great host as well. Quick and friendly communication and provided lots of recommendations on places to go and eat.
My only complaint was not staying there longer. Fantastic stay.