I had a great stay in this apartment. it is about 12 mins to Cascais and a few minutes to Estoril station (from which you can access the beach).
Mini supermarkets are very close for getting essentials and the Auchan that is 10 minutes walk has absolutely everything you need.
I loved how quiet the apartment was and how I could sit on the balcony and enjoy views of the sea.
I loved the amenities in the apartment especially the dishwasher and super efficient washer dryer.
I'll be back!