We enjoyed our stay at Oswaldo’s place very much. It is central to everything we wanted to go. Very clean place, has everything we needed and fast WiFi. The surrounding areas were a bit sketchy but still safe, overall we were very comfortable. From Cais do Sodre you can go just about anywhere in Lisbon via metro, trolleys, cable car/electric car, train and bus. Timeout Market is around the corner 2 minutes walking distance.