Carlos is a great host. He greeted us at the apartment and provided a lot of local tips. He also offered to help during our stay. The apartment is really nice with a beautiful view of the city. It's in walking distance to many places and is in a lovely neighbourhood. You need to climb up or down some steps to get to the place, but Lisbon is a hilly city, so that is normal. I would recommend Rossie Metro station if arriving by subway.