My family and I stayed at Marias appartment for 9 days and enjoyed it. Its very good value for money. For future guests I have this pros and cons list.
Pros:
Location (easy acces to estoril center, cascais, sintra etc. Supermarket and farmacy very close)
Free parking
Fast WiFi
Nice view
Friendly and velcoming hosts (both Maria and Carla were very helpful)
Cons:
Dishwasher not the best
Dushcabin is leaking
No couch/sofa in the livingroom, just the extra bed/madress
Church Bell (the church is just next to the appartment and the Bell ring approximately every half hour from 9am until 10 pm. You hey used to it, but maybe something to consider if you have infants.