I stayed with Leonardo and Araceli for 6 weeks to attend an art course in Florence. Both Araceli and her husband were very kind and accommodating and were even kind enough to provide me with a warm water bag and ginger and lemon tea when I was struggling with a cold.
The apartment is in a quiet Italian neighbourhood not far from the center of town and very close to the Arno river. Very fast internet connection. I would definitely recommend staying here.