We had a really good time staying at Marie and Antonio's place. Both of them are very open minded and helpful. The room was nice and clean, and a little breakfast was also offered in the morning. Moreover they allowed us to use the refrigerator and their stove.
Communication also worked out great - they're living in a nice and safe neighborhood close to public transportation.
In case you have a lot of luggage be aware that there is no elevator to the 3rd floor ;)