The apartment is in a really unique part of town where there is no car traffic. Definitely a good neighborhood to stay in to add to your Lisbon experience. Make sure you get detailed directions from them before you try to find it. Google maps is NOT correct and a taxi cannot take you directly to the apartment, so don't rely on that. Request to meet their employee at the Fado Museum and she can show you the way. It's not too far from there. That is the easiest thing to do.