The 2020 Grand-Mayne from Saint-Émilion is a Bordeaux blend that has garnered high praise from multiple reviewers. This vintage is noted for its rich complexity and has been described in various glowing terms by wine critics.

Robert Parker's Wine Advocate awarded it an impressive score of 95 points, highlighting its "opaque purple-black color" and a bouquet featuring "ripe black plums, dark chocolate-covered cherries, and blackberry pie." Reviewer Lisa Perrotti-Brown noted its "ripe, rounded tannins" and "beautifully perfumed" finish.

Decanter rated the wine 94 points, emphasizing its "punchy and vibrant" nature with "clean and crystalline" execution. The review mentions a "smooth core with just grainy tannins," complemented by "vibrant and concentrated blackcurrant and plum fruit."

Jeff Leve also bestowed a 94-point score, noting the wine's "complex nose" with floral, espresso, and black fruit aromas. He praised its "freshness, silky tannins," and "mineral-edged, vibrant, sweet fruits," suggesting it may be the best Grand Mayne vintage ever produced.

Jeb Dunnuck shared similar sentiments, also rating it 94 points. He found it to be "concentrated, incredibly satisfying," with "ample mulled red and black fruits" and "ripe tannins."

Vinous and Jane Anson both awarded the wine 93 points, with Vinous noting its "earthy, savory nose" and "harmonious" palate, while Jane Anson commented on its "concentrated" nature and "appealing purity of fruit delivery."

The Wine Independent highlighted the blend's composition—73% Merlot, 24% Cabernet Franc, and 3% Cabernet Sauvignon—and described its "deep garnet-purple color" and "cedary wafts," noting that it "needs time" to fully develop.

Overall, the 2020 Grand-Mayne is celebrated for its complexity and depth, with reviewers agreeing on its potential for aging and enjoyment.