A friend and I were visiting Lisbon for the first time and stayed at Madalena's apartment during part of our trip. It's in a great location for sight-seeing, shopping, eating and drinking -- and is furnished with all the essentials. The bedrooms are upstairs and the bathroom is downstairs behind the kitchen so it's a strange layout but was quite comfortable for the two of us -- and I think it would be comfortable for up to 4-people. The terrace upstairs off the twin bedroom is nice to have -- although a little awkward carrying snacks, coffee or wine up the stairs and through the bedroom.
The manager Julia is very helpful and kind -- and she left a bottle of nice wine for us to enjoy :-)
The only issue we had was a loud party across the street that went until 3:00am. But it was only one night, the other nights were very quiet. Apparently there was a private event in the building across the street that night. And Julia was very responsive during that interruption. We stayed at other apartments in Bairro Alto on this trip and they were much louder from the nearby bars and restaurants. I think this apartment is typically quiet but still very close to all the action. I would stay here again.