If you want to see the Quinta Do Regaleira, this is a perfect place to stay. Good communication, near downtown Sintra but tucked on the side street. (And di try the restaurant just up the street, Telhus.)
The buildings are very well kept up, but a bit older. This is might mean you want to have ear plugs or play white noise. Not the fault of the owners at all; just keep in mind this is a very old town.