I loved the apartment, 'Monserate', especially as it rained hard the days I was in Sintra and the apartment had heaters and a hairdryer! These things can make or break a trip in the colder months. The apartment was really really nice; bright, cozy and spotless. Another lady also called Maria met me on the day, gave me a map and a brief orientation - communications where good throughout and very friendly.
I was only originally booked in for one night and changed it to two I was so content there. You couldn't be in a better location, quiet even though it's 2 mins from the main square and the bus stops that take you to all the main sites. I walked up from the train station and it took me 10 mins. Great stay I'd definitely recommend.