We had a lovely time in Sintra. The apprtment is really on the beach so u can hear the waves anytime. THere's a private car park which must be very useful in peak season but no problem to park in september. Great fish restaurant 300 m away and 15-20 min drive to Sintra historical center*; Our host was always helpful and we had no problem durng our stay. I recommend this place especially if you like surfing/bodyboard since the waves and streams can be strong so not ideal if you want to train for long swimming. Another point : a car is really important in the area even if there are buses to Sintra/Lisbon.