We spent a wonderful week in Eduardo's house.
Eduardo is a great host and great communicator, everything went easy and nicely from start to end and he is simply a very nice person, always accessible and helpful with recommendations for local restaurants and hangouts. He even organized a babysitter for us, which he really didn't have to do (she was amazing too by the way)!
The house is very beautiful, very big, perfect for 2 families, and the rooms are actually more beautiful in real life than in the pictures. The house is very comfortable and very well equipped with everything you need: washer/dryer, dishwasher (even an espresso machine!). The outdoors are the real highlight of the house, and the kids loved the garden and the pool while the adults enjoyed the back porch. The only little thing that could be improved in our view is the bathrooms (need to be refreshed a bit) but nothing major at all.
The location is perfect (with a car of course), we could quickly visit Sintra, Cascais and Lisbon. We also enjoyed the beaches at Praia Grande, which is about a 12 minute walk.
In short we simply had a great time and this house is a great value for money, I highly recommend it to anyone wanting to stay in the area.