Michele and his brother, Orlando are very nice men. They are kind and considerate.
I met Orlando in person, and chatted with Michele online. They provide detailed information of Firenze such as local restaurant, bar, and spot which has beautiful scenery.
Their house is spacious, cozy and is located in the center of Firenze. Duomo and SMN station are within 7minutes' walk of the house. The only drawback is that there is no elevator, but it's a minor issue I think.
I strongly recommend you to visit their house if you want to travel to Firenze.