We spent 3 nights at Enrico's place.
pros:
the location is great! It is convinient to get to the center of Florence. And the food market (Mercato Centrale) is just in front of the house. You can buy there plenty of tasty things! =)
The flat is something traditional and it was a really interesting expirience to live there.
cons:
aircon is only in the kitchen. and it's really noisy.