Great apartment, amazing location, very clean, bright & spacious! Had a great stay, would definitely recommend if you do not mind the noise from the busy/lively street :) the apartment is literally right around the corner from Duomo. And you’ve got the AC in every room - so, the shut down the windows and turn AC on - to solve the noise issue.
The door downstairs requires a bit of art with wobbling the key in it, but you get used to it after 2-3 times. There’s been a bit of smell from the bathroom in the master bedroom - opening the window helped. Google address could be a bit misleading - check the location in Airbnb - otherwise Google maps will bring you to the piazza Signoria - which is 300-500 meters away.