The location is a lovely neighborhood in a pedestrian zone half way up the hill upon which the Castelo sits. Very good restaurants and a supermarket are steps away, as is an elevator that brings you down the hill to the more crowded streets in central Lisbon.
The apartment was beautifully appointed and comfortable with nice views from the living room and master bedroom. We really enjoyed everything about our stay.
Mafalda was, literally, a super host. Since we drove in a rental car from Porto ( big mistake since only taxis and residents can enter the area), she patiently helped us navigate our way to the apartment, pointing out good places to eat in the environs. She was very friendly and responsive to our questions during our visit.
I would definitely stay here again.