This is the cheaper of the two Paradors in Santillana del Mar, and it shows.
The exterior is pleasant but the interior is gloomy. Our room was spacious and nicely furnished but with a tiny window which looked out onto a wall, giving the impression that you were in a basement. The bathroom was rather shabby - the hot water from the bath tap was very hot, but also chocolate brown, so we gave that a miss & used the shower, which was OK.
Breakfast was in another gloomy room off the lobby. Not bad, but not up to the usual Parador standard. The hotel doesn't have a restaurant so we ate in the other Parador, the 4 star Gil Blas, just across the plaza. We had an excellent meal in a nice dining room, with friendly staff and prompt service.
We didn't get to see the rooms, but from the look of the public areas this seemed much the better of the two hotels. If we stayed in Santillana again, we would definitely pay the extra and stay at the Gil Blas.
Santillana is a charming and well preserved place with plenty of restaurants (and tacky tourist shops) and well worth an overnight stop. Although it is "pedestrianised" don't assume that you can stroll around with impunity. During our visit, cars and vans were trundling around all the time, so be careful before you stand in the middle of the street to get that great photo shot.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC