We stayed 5 nights in Carol's rooftop.
If you are looking for a special place in Florence that will be the one. I believe the views over Florence are unique, and the location it's just super convenient both to visit the most touristy areas and also to escape from them into a more real Florence. There is a great market just a few minutes away so you can buy all the Italian delicacies to enjoy in the comfort of the flat.
It is true that there are loads of stairs to get to the apartment but I felt it was 100% worth.
The place is spacious and both beds were truly comfortable, clean and so were the towels. Heating was great, wifi works very well and you also have a great tv.
As I believe we were the firsts guests in this flat there were a couple of bits and bobs to improve, but Annarosa who runs the place was always very quick responding and supplying for our needs.
We are very much looking forward to visit Florence again and staying in Carol's rooftop.