I stayed at Ines and Samuel's apartment when I came for a 3 week Summer School in Lisbon recently. It was close to the Sao Sebastiao metro station, supermarkets and several good restaurants nearby. Easy to get into the old city to go out, but away from the crazy crowds. Good kitchen and washing machine facilities for a long stay like mine. My favourite thing about the area was the Gulbenkian Gardens at the end of the street and I went every day to sit amongst the trees and watch the ducks - possibly, the nicest park I've been to in any city in the world!