I had a lovely stay in Maria's 'Dolls' House' - it is so close to many great sites/attractions and the metro, and yet was very quiet and comfortable.
Maria was very helpful and welcoming, and I felt very at home.
A few pieces of information: the stairs upto the apartment are quite steep; and the apartment is the first door (on the left) on the 2nd floor.
If I find myself returning to Lisbon, I will definitely be staying at Maria's 'Dolls' House' again.