I report my parents' comments, who shared the flat with a couple of friends:
1. Excellent position in an elegant building in the best part of Firenze
2. The flat was very comfortable and spacious; a minor problem was that there were only bed duvets but not blankets and it was really too hot for using the duvets and too cold to stay without.
3. The cleaning were superficial and just sufficient: one of the bathroom was not very clean and the tents smelled dusty.