PROS: The place is close to Sintra. It was very clear to us that a certain effort was invested into the space to make it suitable for comfortable stays. The furniture looks new, utensils are in a very good condition, amenities are almost new or older but reasonably functional (with some noncritical problems). Technically, the inside of the place deserves 4.5 stars. The host responded to requests quickly.
CONS. This is a part of a homestead, apparently, with other businesses in its yard (it may be workshops or a garage). The immediate neighborhood is industrial, and the house is connected with the outside world with an unpaved road. Depending on the direction you come from, you may need to drive this road about 0.5 km or about 150 m. The place is quiet generally, but we were awaked each morning by several loud dogs barking nearby. Apparently, there is a dog hostel or farm within this homestead. However, the main reason why we put only 3 stars for our stay is that the tap water was shut off in the apartment exactly at 11 am on the day of our departure without any warning. We were with a small child, and different things may happen unrelated to any abuse of hospitality. In fact, the last minutes right before our departure, my wife spent washing dishes, and at about 11:01 am she went to the bathroom to wash her hands after she finished with the dishwashing. She could not do this, and we used some bottled water that was with us. We left at 11:07 am. We have never met anything like this before and were shocked by this attitude. In any case, we would expect that people should be treated as people, not as an unfortunately necessary element of a business.