Me and my wife stayed here for a month in Oct-Nov 2017 and had a wonderful stay. The neighborhood is nice and basically within walking distance of any place in central Lisbon. Plus the subway is right next door, so it is easy to get around.
The owners are very nice and the room is nice and clean. There can be some noise from the post office but it didn't bother us too much. The only con I can really say is the wifi, which is terrible.