I stayed again at this place, this time with my girlfriend. Everything was perfect like last time.
There are many supermarkets at 10 min walking distance (Mercadona, Dia, and some other) and the host is always willing to make you feel at home.
About the people complaining about noise, well, if you want perfect silence you can pay a lot of times more money and stay at a hotel (even if personally I stayed at hotel in Madrid and it happened that it was very loud), but since the price for this accomodation is very reasonable for Madrid, and considering the host and place in general, i'd say it's a very good option.