Initially I was concerned about staying at a place with little AirBNB reviews (like another person wrote), but Letizia's apartment was great. Lots of room (loved the loft style and tall ceilings), very clean, and in a quiet (but close to everything location).
Upon arrival Letizia met us at her home and got us situated. She was great with communication and checked in on us to make sure we were enjoying our stay. She even called the cab for us to the train station.
After walking through Florence it was clear we were in a perfect location. The apartment is very close to the Duomo and about 10-15 minutes from everything else you'd want to see. Fortunately it is still in a quiet neighborhood and you aren't thrown in to the mass crowds our tour groups.
A bonus was that her tv was a smart tv so we were able to watch Netflix late night when we wanted English TV.