I was very disappointed with Las Marianas.
I asked for a non-smoking room and the lady next door was smoking and the smoke goes right through the ventilation system. I complained but action to resolve not forthcoming.
Breakfast is orange cordial and coffee (not bad) and white bread with jam.
Doors paper thin (mine you could see through) and noise travels all over the hosteria. Impossible to sleep beyond 8am. Very expensive for what you get. They have marketed the place well but it is not the reality.