We really enjoyed staying here. We have stayed at many Airbnb's and few properties owners are as quick at responding. Arianna responded to every one of our concerns within minutes, sometimes even within seconds.
Regarding the location, this apartment is in the center of Florence near all the top shopping centers. The physical arrangement as described is accurate. Specifically, this unit is on the fifth floor (i.e., fourth floor if you consider the first floor the Zero-th floor), the unit is organized as a loft with the bedroom above the living space and kitchen, and accessing the unit is easy. The bedroom has a roof is not very high, so maybe the bedroom is not ideal for someone who is super tall.
The only negative things are (1) the lack of elevator and (2) there was a weird smell in the bathroom. Regarding (1), I would not recommend this unit if you have difficulty going up the stairs. Regarding (2), after messaging the host, she suggested using some liquid to clear up the smell and that helped. I am not sure in the smell was coming from another unit or the sewage piping, but the host's proposed solution certainly helped.
Overall, I would recommend this unit to anyone who wants to be in the center of Florence and does not mind climbing up stairs. Additionally, the host is one of the best hosts we have had because she was very accessible and quickly responded to every request/question.