This has been the best apartment, we have rented using AirBnB.
All of the aspects were on a top-notch level.
Anna's hosting skills were outstanding, thanks to her we felt at home, even though we were thousnds of kilometers away. Also, she provided us with a lot of tips on what to see and where to eat in Florence - all of those info was spot on.
As for apartment. It was really comfy and clean. Location was perfecr for us - close enough to get to center on feet, but far enough to be quiet and without much tourist traffic.
Apartment itself was beautiful. Private terrace (which was enormous!) was a great place to have a quick breakfast, or spend some time drinking wine and enjoying the sunset.
To summarize:
With clear conscience I can recommend staying at Anna's place. You probably won't find such a great apartment and amazing host in whole Florence!