If you want to have it peaceful and quiet without leaving the civilization, this is the place for you. Apartment is perfect size for a couple. The garden is beautiful and you can sit outside and even have a barbecue. You can find everything you need at the place. Water and internet work just fine. It was at first (due to the weather) a little bit humid inside, but Eduardo immediately organized a dehumidifier and that solved the problem for good. Parking your car is not a problem.
If you don't have a car: there are just short walks to different spots:
Beach = 10 min
Bus stop at the roundabout (441 to Sintra) = 13 min
Smaller supermarket at camping place = 15 min
Several good restaurants = 15 min
Big supermarket in Praia das Macas = 20 min
Even more great restaurants in Praia das Macas = 25 min
The area is very nice for hiking tours -- don't miss Cabo da Roca (it's overrun by other tourists though) and if you want to have a breathtaking view, hike to the Santuario da Peninha. Remember that it is usually a bit colder than in Lisbon, because of the ocean.
The landscape is just beautiful and wild and green -- and the location of the apartment is perfect: peaceful, quiet, but not too far aside; two official hiking paths are nearby.
Also, Eduardo is a very good and friendly host. I really enjoyed staying there.