I spent a month in Filipe's apartment and he is an easy-going, relaxed person and we really had no problem with communication. He tries to make your stay as comfortable as possible. The room and the whole apartment are clean, well equipped kitchen, nice and safe neighborhood, buses in front of the building, metro a few minutes on foot, supermarkets within walking distance. It is uphill but it says so in the description and you're in Lisbon so you must be prepared for walking up the hills ;) A really good experience.