My rating is a compromise between 8 for the singing and only 4 for the overall concept. Yoncheva and Calleja are splendid, so let's forget about the weaknesses in some of the other singers. The problem comes with Alex Olle and his two collaborators who have given us this strange production in which a Druid priestess is costumed as a Catholic priest... really. Druids died out when Gaul was Christianized, or even before, so where does this come from? There are other anachronisms, but I won't bother to list them. Just be aware that eccentricity rules this production, but can't ruin the singing.