Nice hotel in the middle of the attractions and cute shops in Sintra, but nevertheless quiet at night. Clean, comfortable, beautifully decorated, with a nice touch of having refreshments available, especially the chocolate cake. Breakfast was fresh and varied, and the standard Portuguese fare.
BUT check-in was horrible due to lack of signage. Using street signs are already difficult in Portugal because they are hard to find and read. Although we had a map app telling us we were right on top of the hotel, we could not find it...because the hotel does not have legible signage visible from a reasonable distance. We were up and down the streets and stairs for ~20 minutes w/ our luggage, even asking nearby shop owners for directions (who could not provide any). My wife happened to walk up to what looked like a piece of paper on a door on a residence, which finally indicated the hotel's presence. My attached photo, taken from the walkway, should prove the inadequate/non existent commercial signage.
So book the hotel for its convenience and quality, but when checking in, just look for a piece of paper on a door, which will indicate you have happened upon your accommodation.