Staying at Estoril is a great option if you want to know Lisbon and surroundings. This house is very good and well located in a quiet neighborhood.
However, it is better to have a car. We rented a Mercedes V-Class 8 pax that fit perfect in the garage.
The photos of the house are faithful and the house accommodated well seven people (three couples and a single person).
The owners were always available and helped us providing information about the local services, wines, supermarkets and restaurants.
One of the travelers is a celiac person and we have no problem to find gluten free products nearby.