A great host, brilliant at communication. The apartment itself is perfect for a short stay - we stayed a week - and it has everything you need.
Sintra central is 10 minutes down the hill and closer are some brilliant restaurants; highly recommend Nau Patina and the chocolate shop Da Villa (best ice cream!).
As others have said, it’s so easy to walk up to the castle directly opposite the apartment and through the National park.
Such a wonderful stay, and also half an hour drive into Lisbon so perfect to explore the city too.