The apartment is adorable and within walking distance to a lot of interesting sights and restaurants. Coming from the metro Cais do Sodre, I would recommend taking the round about way there to avoid the big hill, that we took on our way there - which was not so pleasant with the suitcase (do not take Calcada de Salvador Correia de Sa but go up R. Gaivotas).
I would definitely stay here again during my next trip to Lisboa!