We had a fantastic stay at Mario's flat! Mario was very kind and waited for us to check-in late at night after our flight was delayed by 1.5 hours. His office is right across the street, so we always saw his friendly smile and could ask him for recommendations on what to do and see. The flat itself was very clean and spacious, and the location cannot be beat: minutes away from the main train station for a Sintra day trip, and right in the middle of all the old neighbourhoods perfect to stroll around.