92 points Wine Advocate
Disgorged in July 2024 without dosage, Coulon’s 2018 Blanc de Blancs Chouilly Les Hauts Partas derives from a chalky 0.22- hectare east-facing parcel in Chouilly, which the family bought in 2012. Planted in the mid-1970s with massal selection, it’s vinified in used 228-liter barrels. Flamboyant, it jumps from the glass with aromas of nashi pear, peach, tangerine and warm bread. It’s full-bodied and flavorful, informed by the hot, dry summer and comparatively late picking, muscular and ample, with ripe but racy acidity and low-pressure mousse, concluding with a generous finish. It will drink very well in the near term, though it lacks the freshness of renditions like the 2016.

93 points Vinous Media
The 2018 Brut Nature Les Hauts Partas is a pure Chardonnay from Chouilly. The mellow, fresh flesh of Golden Delicious apples is creamy and inviting on the nose, suggesting ripeness and juiciness. A lovely smokiness hovers in the background, alongside a sense of wet oyster shell, yet the creaminess of the apple flesh and a hint of bitter apple pip set the tone. This is smooth, salty, enticing and profound - an entirely gastronomic Chardonnay of immense creaminess. Zero dosage.

Grapes: 100% Chardonnay 
ABV: 12%
Dosage: 0 g/l
Time on Lees: 7.5 years (90 months) sur lattes
1er Village: "Les Hauts Partas" in Chouilly, a Grand Cru village located on the Côte des Blancs, 45 year old+ at 150 m on moderated slopes with a North-East orientation. The soil is composed of campanian chalk.
Fermentation: Wine ferments spontaneously in 228L oak barrels.
Malolactic Fermentation: Natural malolactic fermentation.
Élevage: Wine ages in oak barrels for 10 months, followed by 90 months in bottle.
Press Wine: Cuvée from first pressing retained for Champagnes, Taille second pressing sold off