My family and I (4 adults) spent two weeks in this apartment in August. And it was lovely: very nicely furnished, with a perfect localization: close to Sintra city center (10 min) to Lisbon (20 min) and to the surrounding beaches, and in very safe neighborhood.
We did appreciate to be close to the touristic attractions, and on the same time to enjoy a very comfortable house, with clement weather (especially when its very hot in Lisbon).
André and Sofia where really helpful and gave us all the informations we needed. We definitely would recommend this place to our family and friends who want to discover the enchanting and breathe taking region of Sintra