The appartement is nice and cosy, and Margaret is lovely, discreet host. It's 10min away from the train station Santa Justa. Concerning the noise, we stayed a week without hearing any trains and the street below is quiet. The center is half an hour away on foot, there is a direct bus connection to the center from the little busstop right in front of the house, and there are a lot of bus connections at Santa Justa for pretty much everywhere.