Casa das Hortênsias was a nice place to stay. It was very clean and comfortable. The Location of the B&B is not in the center of sintra but you can get everywhere quite quickly. there is a busy street nearby, but we didn't hear too much of it. Alberto was a really nice host and gave us a few tips, what to do in the short time we had. The Breakfast was alright - nothing fancy, but good.
Only thing which was a but strange where the many rules they had - no food in the room and quiet time after 22:00... they must have had some bad experiences.