Mario was absolutely great. He really makes you feel at home and his apartment is beautiful. I would definitely stay with Mario again if I return to Madrid! The apartment is in a very central location - short walk from the city center. And it is located in a neighborhood area where you can find both, calm cafes and lively restaurants. The bed was very comfy and big and the other rooms in the apartment were rented by nice and friendly people, so I have always been in good company:)