After my trip to Florence, I arrived quite late (~20pm) at the BnB, but that was no problem for Ketjona! She very kindly waited for me at the entrance of the apartment and gave a quick tour.
The location was better than we had expected: almost everything can be reached by foot, and many great restaurants/bars are nearby. Only the part of Florence south of the river is a 20 minute walk, but we never experienced that as a problem.
The apartment has many facilities, which are accurately listed on the apartment's advertisement. We chose this place partially because we needed a 'house' for 2 weeks with good WiFi to do some work, which was perfectly provided by this apartment.
This review would be hard to believe if I would not list one drawback :p, which would be the amount of daylight that you have during the day. That being said, if you're visiting outide the cold periods, this problem is likely solved by using the apartment's private patio.