Patricia was a good host, and her place was truly lovely.
This Airbnb is a fully-operational professional bed and breakfast, decorated with attention and with shared common areas for guests to enjoy. The building is stately and the grounds are well-kept, while the rooms are impeccably cleaned and prepared freshly each day. Private and gated, the house is very peaceful. Ample private parking was a huge plus.
Patricia communicated promptly with us (noting a few times that check in could not be later than 7pm) and was welcoming when we arrived about 6:30. She offered us a room upgrade, and when she learned a bit about our tastes and needs actually offered us a second upgrade, so we were really wowed by her consideration. She also pointed us to good restaurants in town, and walked us through how to best arrange our sightseeing in Sintra.
Breakfast was tea, coffee, breads, butter, jam, some cured meats and cheese, satisfactory our first day but we chose to go explore local cafes the second day. Any breakfast included in an Airbnb is a perk, above and beyond.
This was an excellent home base for exploring Sintra, and I'd recommend it to anyone who likes a quiet retreat convenient to the activities of the area.