I loved my stay at Salvatore's house. I stayed there for 4 months when I was studying at Bocconi university (15 minutes from the house and very easy to reach) and I am sure that this was an awesome option.
First of all, Salvatore is an incredible person, he was always trying to help me since the day I arrived. He even cooked some Italian food to me a few times and was always asking me if everything was ok.
About the house, it's big and confortable, with an amazing kitchen. The bedroom is very good, with a big bed and a desk to work/study. I definitely recommend this house, no problems at all!