What a great location! We stayed at Ana's place for 4 nights with our 2 young children. The apartment is in an excellent location and very accessible.
Access to the Tram 28 and 15 are both very close and the train station to Sintra is within walking distance.
The apartment is very clean and well equipped. It did get a little loud outside the master bedroom a couple of nights but once we closed the windows, it was no problem.
We had a lovely time and wouldn't hesitate to recommend Ana's apartment (or to stay there again ourselves!)