Apartment in the very center of the historical part of Sintra.
Very convenient to visit the castles nearby (you can even see the national palace from the window!)
We were there beginning of November and the heater was broken when we arrived. We were extremely cold and I don't even know if one heater would have been enough. Simple fan heaters were provided but they are quite useless given the surface.
Also the bed could have been more comfortable.
In short, great place to stay but not in the winter.