First the good: The location is very convenient. We liked that it was walking distance to the train station, duomo, and other main attractions. The apartment is very clean and check-in was smooth and easy, despite getting to Florence a few hours later than anticipated. The key-pickup at a nearby office worked very well and the staff was friendly and helpful.
The less good: We were not as thrilled with the apartment itself because it had a few (albeit minor) issues. Mainly, the heat and hot water were difficult to control and the instructions were a bit confusing. When we walked in there was an intense flowery air freshener that we had to unplug and stash in a drawer. There are no garbage bins in the building and you have to take the trash out to public bins a few blocks away. The upstairs neighbors also seemed to be moving heavy furniture until 1-2 am, which made it hard to sleep in the smaller bedroom.
These are all small things and overall we enjoyed our stay.