The location is unmatched-- very close to the Duomo, Mercato Centrale, City Center and SMN Station. The location also makes it very easy to travel by train/bus to other points of interest near Florence. It's also close to a lot of restaurants, supermarkets and churches/piazzas.
The place is awesome, spotlessly clean with very nice towels and sheets; comes complete with a fully-functioning kitchen and dining area, washer, iron, desks; having a lift in the building was also of great help.
Alda truly is a super host. She is genuinely concerned for the welfare of her guests-- explains and responds to queries clearly and promptly, prepared a binder of instructions and recommendations for guests, gave us more than just basic amenities (provided toiletries, laundry detergent, cleaning supplies, bottled water and fruit juices, and her mom's greek yogurt, which is the BEST).
This is the best Airbnb we have stayed in! Will definitely recommend to our friends who will visit Florence.