Please stay longer here than just three/four days - there is so much to explore in the area, so much to be hiked to (for example to Sintra, to Cascais, Peninha, etc.) and you do not need a car! Every place is easily accessible by bus or just take a taxi.
Staying on Barbros terrace already will take one day, to listen to the silent sounds of the wind, to observe the games between clouds, the fog and the blue sky, all almost at the same time, and to smell the fresh air - and - of course - have a nice chat with Barbro!