We had a wonderful time staying at Sarah&Pedro's apartment, which is located directly at the train station Santo Amaro and 3 minutes by foot from the beach. The apartment's location is great although you can hear the trains all the time (we had no problem with the noise - might be difficult if you are sensitive though). The apartment was very clean and spacious with a well equipped kitchen. Communication was easy and very helpful. If you are looking for an apartment that is close to the beach and offers good infrastructure to get to the city of Lisbon: This is the apartment you are looking for :). Thank you for the great stay!