We had a wonderful stay at Maria's place! It's a lovely apartment that immediately feels like home. The location is pretty much perfect, Lisbon's beautiful old city is within walking distance and tram 28 stops in front of the apartment.
Inside it's clean and has enough room to easily accommodate two people and I think four would be fine as well. The airconditioning make for cool and great sleeping, the outside terrace is a great breakfast-spot.
Maria is very friendly, communicative and easy to reach. Check-in and out were supersmooth.
Would definitely recommend.