We had a great stay in Lisbon, and one of the main reason was the great location of the flat. Just a few minutes walking distance from many places in Lisbon, it was very convenient to move around for the visits, as well as for the bars and restaurants. the street and area are very typical of Lisbon. The flat is spacious and well equipped, it was very comfortable for 5 persons.
However, keep in mind that two of the bedrooms have no window, making the flat quite dark and difficult to ventilate. Also, there is a big problem of humidity in the bathroom, causing bad smells around. I believe it must be quite different during summer time as it is dryer, but during winter, it was difficult to get rid of the smell.