This place has both a gorgeos location and a terrible location: it's located on the main hill of Sintra with beautiful views, it's peaceful in remote. On the other hand it's 35-40 minutes walk away from the Sintra station through the labirinth of cobble-stone alleys (you have to carry your suitcass, impossinle to drag it) so it's recommended if you plan to leave in the morning and come back in the evening.
Otherwise the house is clean and nice. The lady only speaks Portuguese but understands Spanish as well.