Our stay here was great! Awesome location- extremely quiet at night, but still very close to all the main attractions of the city. We walked everywhere & even made multiple trips back to the AirBnB to drop bags off when we wound up with too much stuff. It was very nice to have that option!
The two minor annoyances were the lack of being able to close the bathroom doors all the way, due to the age of the hardware & the large amount of stairs. Bathroom wasn't a huge deal for us, but worth noting if you've got a mixed group with you that isn't super comfortable with each other. The stairs also were not a major deal for us, but definitely be aware there are a lot of them! Especially if you have heavy luggage or less mobile members of your group.
Overall, I'd highly recommend staying here if the two small issues aren't deal breakers for you! We had an excellent time & it was a super peaceful home base for our busy trip to Florence.