We stayed at Maria's place for a month from mid September to mid October and absolutely loved it! The location is incredible, across the road from the best beach in the area. The apartment is right on a busy main road but it's really quiet when you keep the window shut (the aircon will keep you cool).
There were many days where we just carried our lunch across the road down to the beach and had a swim in our lunchbreak.
The WiFi was decent for 2 people to work from home - sometimes it was a little patchy during Teams calls, but it was good enough the rest of the time.
There are a few cute cafes and restaurants in the area and you're only an 8 min train from Cascais.
Maria was a lovely, warm and welcoming host who was on hand to check us in personally even though we arrived late, was easy to contact during our stay and allowed us to extend our trip at short notice.
I would recommend this apartment to anyone!