Great flat in a great condition. Reasonably close to the main places of interest. Famous 28th tram is just in front of the building.
Flat is very bright with all necessary equipment.
High quality windows, therefore no noise at all (we were visiting Lisbon in November, probably there could be some noise issues during the summer, with opened windows, though the flat is equipped with the air-conditioner and the bedroom windows not facing the road).
Some people were mentioning the smell in the second bathroom, yeap, it is there. However, it could be caused by the very rare usage (who needs the second bathroom in a single bedroom flat? haha).
Some people were also mentioning the issues with the hot water, and again, it is true. Boiler didn't work properly at our first night, later on it was fixed, but the amount of cases make me thinking that there is some major issue with it.
I would also recommend Maria and Luigi to provide some tea, I know it is hard to believe, but not everybody are coffee-lovers.
In general would recommend to stay with Maria & Luigi.