We really enjoyed our stay at Casa da Póvoa (family of 4, plus baby and a dog, with everyone having a great time).
The house itself is great, from the media room, to the garden barbecue outside or even the fireplace. We weren't even able to exploreeverything as there was so much to do. Also, the house was really well equipped.
The location is great for travelers with car, since it is near both to Mafra and Ericieira. Also, the commuting time for Lisbon is quite reasonable. So, it can be a great spot for discovering all these regions.