What Alexandra offers here is more than we first expected to find during our stay in Sintra. She has lived in this house with her family for several years before refurbishing it and you can really feel that this place is a real home, and not just a house. The place is well-equipped and has plenty of sleeping opportunities. It is furthermore not just incredibly nicely decorated and clean, but also close to all the interesting spots and attractions in Sintra and the National Park. You wouldn't even need a car to get to most of the castles and the palace (you can either walk or take a local tuktuk, a small taxi).
Alexandra is a very friendly, open and helpful host. She met us in a place near her house (that is easier to find with google maps) and showed us the surroundings. She also showed us where we can find nice local cafes and restaurants (which isn't necessarily easy in Portugal if you're vegetarian/vegan). She is very attentive, obliging and easy to get along with - a real Super Host.
Also, Alexandra has another listing (the wooden house) on airbnb that she showed us as there were no other guests that night. This second house is probably even more stunning than the blue house - so something that we would highly recommend checking out as well! The photos don't do it justice.
She has put a lot of work into the two houses, and you can really appreciate that. If we come back to Sintra, this is the number one place we would book again :)