We booked Casa Das Plumas as a group of friends wanting to explore the area. The house proved to be a fantastic for exploring with easy driveable access to Obidos, Caldas Da Rainha and surrounding coastline. The house itself is very well equipped and spacious enough for a group, with a fabulous living space upstairs and lovely views from the ample roof terrace. The internal stairs are steep but we didn't find this an issue, there is also as there is an external staircase that can be easily used.
The communications with the owner and housekeeper were superb, with lots of information provided - we felt well-looked after without the attention being intrusive. The local restaurants were very good, in both Nadadouro and nearby Foz, and the closest ones being much cheaper than Lisbon. Yes, you might need to drive but we left the car behind one night after a few glasses of wine - it's easy and not too pricey to get a taxi, and we had a lovely walk along the lagoon into Foz the next day to pick up the car.
I'd recommend this house, and to anyone who hasn't visited the area, do visit and explore - it's beautiful.