We spend 4 days in Lionels house and had a great time! We arrived quite late due to a delay, but that was no problem at all. Lionels parents brought us fruit from the garden and charcoal so we could use the indoor grill. The house was very clean and is very well equiped (nespresso machine, grill, pans, breakfast).
Ericeira (Ribreira d’Ilhas) has a beautiful beach with a nice reastaurant were you can eat, lounge and relax. Lisboa and Sintra are easy to reach by car, great for a day trip. We highly recommend this place!