Für Robert Parkers renommiertem »Wine Advocate« verkostete und bewertete Luis Gutiérrez die Weine von Raúl Pérez aus der D.O. Bierzo. Dem roten LAS GUNDIÑAS (LA VIZCAÍNA) 2017 vergab er stolze 93/100 Punkten und schreibt nachfolgend über den rebsortenreinen Mencía im Original:
„La Gundiñas is the wine that shows the most differences between 2017 and 2018. The 2017 La Vizcaína Las Gundiñas is dark and concentrated, a wine of sun, while the 2018 is delicate and feels like a mini Bonnes Mares! This is quite like a Cornas – meaty, juicy, a little reticent and powerful, with abundant tannins. This is one wine that behaves better in 2017 than in 2016. This is a plot that has ups and down; it might be more regular in the future, as they finally bought it in 2018. Some 5.500 bottles produced. It was bottled in May 2019.”