I stayed at Giancarlo´s apartment for one night along with 3 friends and I couldn´t ask for a better experience. It´s a comfortable and really clean place , perfect for spending a weekend in Florence. Giancarlo was really kind even helping us with his own car to reach the nearest supermarket and also coming a little bit later the day of the checkout.
All in all I would definitely stay at Giancarlo´s when I come back to Florence.