Maria's place is super great! It is located in a more quiet part of the city and it makes it an awesome place to stay for longer periods (escaping the crowded areas of alfama, barrio alto, etc). Perhaps for a short stay one might prefer to be by the city center, though (as it requires a bus to get there from the apartment).
The apartment is nicely equipped and the bed is very comfortable! There is a nearby supermarket and some very good restaurants close as well.
Maria was friendly and helpful with the communication prior to checking in and during the check in she explained all in good details.
Definitely recommend it!