Great location, for starters: less than a 5 minute walk to the train station that connects the area to Lisbon. Even if you rent a car I would recommend taking the train at least once as it goes along the coast and the scenery is lovely.
There's a beach at 15 minutes walking distance but I would recommend taking the train to nearby Carcavelos instead.
Excellent hosts that really make you feel at home. Remember that this small house is located in the same plot as the hosts' house. This was never an issue as they thrive to provide you with privacy. They were always extremely kind to us and asked more than once if we needed anything.
The house isn't new but except for the shower curtains which are a bit of an inconvenience everything is extremely functional and pleasant. Good water pressure and temperature (careful as it can get really hot!), big bedroom and although living room / kitchen area isn't huge we never felt that was an issue.
The little patio outside is absolutely great: nothing better than enjoying the warm Portuguese weather outside while drinking a beer or a glass of wine or simply having breakfast in the sunny days you oftnely get there.
Last but not least and I would even say it was the highlight for us because we love pets: Bob.
Bob is (for now) a small(ish), sweet dog. When we stayed there (2 weeks ago) he was just 11 weeks old and we still miss him.
We loved playing with him and even though he is a cheerfull young dog we never heard him bark at night.
Summing it up it was a great stay and would definitely recommend staying here.