The apartment itself is very cute, but it is very small - it definitely would not fit four people.
The stairs to the mezzanine feel unsafe and the mezzanine itself is very close to the roof and we both hit our heads on the beams at least a couple of times.
The rooftop view is actually a view of the rooftops on the block - I was expecting to be on the 3rd floor looking out onto the rooftops of Florence with some views but that wasn’t the case.
Overall, if you want to stay in an authentic Florentine apartment, pay a little more and stay closer to the centre.