Summary:
Would definitely stay here again. Cristina was truly helpful - clean - modern - 1min from Piazza Santo Spirito (one of the most charming squares we've ever been to) - very reasonably priced.
Arrival:
Even before arriving, Cristina helped us out immediately with advice on parking lots. She is very well organized and punctual: she has a map with bars/restaurants/pharmacies/bakeries/cultural sites marked on it, and every appliance even comes with instructions. She was flexible wrt arrival time. All in all, she was a great and charming host.
Appartment:
Modern and very clean appartment. Recently redecorated/renovated. Airconditioning works perfectly, just like every other kind of appliance.
Calm neighborhood in the rather non-tourist area of Firenze (which is a true asset!): 1min walk from Piazza Santo Spirito where you have a little market in the morning where locals do their grocery shopping - from the afternoon onwards, it becomes a kind of meeting place where locals have drinks and dinner etc.
5min walk to Ponte Vecchio, 6min to the Duomo/tourist area.
I would definitely stay here again/recommend this