96 points Robert Parker's Wine Advocate
"The 2006 Château Léoville Las-Cases has a very complex bouquet with heady scents of blackcurrant, kirsch, crushed violets, rock salt and just a hint of cassis. It is backward and can barely contain its energy. The palate is medium-bodied with fine tannin, very symmetrical and poised, a fine line of acidity interwoven through the black fruit, touches of citrus fruit developing towards the poised and tensile finish. This is a beautiful wine from Jean-Hubert Delon, but it needs several years in bottle. (NM)" (5/2016)

95 points Decanter
"Since 1959 the estate has kept 50% of production back for a second release when the wine is ready to drink, and this vintage has not yet seen its mature release (they are currently on the 2004). You can see why - it's an exceptional wine that still needs time in the cellar. The biggest difference that you see between grand vin and second wine is the size, shape and layers of the tannins. Here they are closed, barely getting going and yet unquestionably full of purpose, doing their job of defining and controlling the dark fruits. Coiled energy supports gorgeous crushed cassis and slate. This still has decades ahead of it. (JA)" (11/2018)

95 points James Suckling
"Aromas of blackberries, black olives, raspberries, iodine and asphalt follow through to a medium to full body with a tight, layered palate and a juicy finish. Hints of iodine at the end. Some licorice, too." (6/2021)

95 points Wine Enthusiast
"While the aromas are tight and firm, once it is in the mouth, this wine just explodes. The tannins are dark, almost impenetrable, dry and dense. These tannins are a layer over the fruit that just piles up with ripe blackberry juice, an edge of blueberry. The soft sweetness of this range of flavors continues on the finish, pitted against the tannins. *Cellar Selection* (RV)" (3/2009)

95 points Wine Spectator
"Offers a pure nose of crushed raspberry and violet, with aniseed. Full-bodied, with beautiful, well-integrated tannins and a long, polished texture to the finish. Very beautiful. Harmonious and structured. (JS)" (3/2009)

94 points Stephen Tanzer's International Wine Cellar
"Bright, full ruby. Brooding aromas of cassis, black cherry, minerals, bitter chocolate, shoe polish and violet; more Pauillac than Saint-Julien on the nose. Then rich, lush and powerful, with impressive fullness and volume. As full and sweet as this is, there's no impression of excess weight and the back end shows a distinctly austere quality, even if the serious tannins are nicely buffered by the wine's rich middle. Really stains the palate with flavor on the aftertaste. Wonderfully ripe Cabernet Sauvignon here; in fact, most of the Cab Franc in 2006 was declassified into the Clos du Marquis. (ST)" (6/2009)

95 points, Robert Parker for Wine Advocate: "Not surprisingly, Leoville Las Cases has produced another classic, potentially long-lived wine in 2006. Among the St.-Juliens, it, Ducru Beaucaillou, and Leoville Barton possess the potential for the greatest longevity. Interestingly, when I visited this chateau in January, proprietor Jean-Hubert Delon offered me two samples, one where the cork had been pulled immediately prior to tasting, and another that had been decanted four hours earlier. Both were superb, but the wine that had had extended aeration was clearly the finer offering. The opaque purple-hued 2006- only 40% of the crop made it into the final blend- exhibits a personality that mimics the superb 1996. Classic aromas of sweet black raspberries, kirsch, cassis, and subtle toasty oak are followed by a full-bodied, concentrated wine displaying moderately high tannin. This cuvee can often resemble a Pauillac wrapped in the St.-Julien appellation, and the 2006 is no exception." (02/2009)