admiral44 I have not eaten there nor my family there. However, as you know, Madrid has a lot to offer from all over Spain and Asturias is well represented.
As you already find out, it has good reviews in many sites so it is proof should be a good one. I would recommend Esbardoshttp://www.restauranteesbardos.com/
if looking for that type of Cuisine of Asturias. Of course the popular one I like is Casa Mingo.
Hope others come in with experience in that one you posted. Cheers