We had a very good stay at Marcel's place. The apartment is conveniently located, very close to the train station and the city centre. Everything was clean and according to pictures. Just some relevant downsides:
-The apartment was very noisy due to street noise. The window and shutter didn't block any of it. There was loud people and music until very late at night (a bar/hostel sits right in front)
-The air conditioning couldn't keep up with the heat and cool down the room, it was randomly shutting down and sometimes restarting the during the night
Good value for money for Florence, otherwise