Potel-Aviron works with old-vine Gamay across Beaujolais's most structured crus. The Vieilles Vignes Règniè, rated 90 by prestige critics, captures the region's mineral precision and dark fruit intensity. The Cuvée Exceptionelle Vieilles Vignes Moulin à Vent (89) and Vieilles Vignes Morgon Côte du Py (88.4) demonstrate the winery's focus on terroir-driven expression from mature vines. Gamay in these northern Beaujolais appellations—Règniè, Moulin à Vent, and Morgon—yields wines with structure and aging potential that distinguish them from lighter Beaujolais styles. Wine Spectator, Wine Enthusiast, Wine Advocate, and Decanter have all assessed the winery's portfolio. The emphasis on old vines reflects a commitment to concentration and complexity rather than the fruit-forward character associated with younger plantings.