97-100 Lisa Perrotti-Brown - Robert Parker's Wine Advocate

"The final blend of the 2017 Cos d'Estournel is 66% Cabernet Sauvignon, 32% Merlot, 1% Petit Verdot and 1% Cabernet Franc. Very deep purple-black in color, it offers up intense scents of crushed blackcurrants, blackberries and black cherries with touches of incense, spice cake, star anise and plum preserves plus a perfumed hint of potpourri. The palate is medium-bodied with very firm yet wonderfully ripe, "sweet", fine-grained tannins at just 13% alcohol—something of a miracle in our modern times. The palate sports fantastic freshness and tons of energy emitted from the intensely perfumed black fruit layers, finishing on an epically long-lingering mineral note. Truly profound."

98 James Suckling - Jamessuckling.com

"Quite the bottle here! Spices, such as nutmeg and cinnamon, as well as dried meat and plums with cedar and sandalwood. Full body. Deep and dense in the center palate and a long, long finish. Shows finesse and tightness. Very polished tannins. Long and ethereal. Try after 2023."

95 Wine Enthusiast

"This impressive wine is structured yet well balanced by an attractive fruitiness that parallels the tannins and the smokiness from wood aging. The density of the palate is countered by fresh acidity that shines through. Drink 2024. -RV"

95 Antonio Galloni - Vinous

"A bold, dramatic wine, the 2017 Cos d'Estournel is seriously impressive today. Time in barrel has done wonders for the 2017, a wine that has really gained depth in élevage. Black cherry, chocolate, spice, new leather, licorice, smoke and incense infuse the 2017 with tons of character, with the 60% new oak very well judged. In 2017, Cos has a level of textural resonance that eludes many Saint-Estèphes. The blend is 66% Cabernet Sauvignon, 32% Merlot, 1% Petit Verdot and 1% Cabernet Franc."

95 Neal Martin - Vinous Media

"The 2017 Cos d’Estournel showed extremely well from barrel and likewise in bottle, continuing this estate’s strong run of form since the 2014 vintage. You instantaneously fall in love with the nose that bursts forth with blackberry, raspberry coulis, crushed stone, iodine and pressed iris petal. The 60% new oak is beautifully integrated. Quintessentially Cos d’Estournel. The palate is medium-bodied with supple black fruit laced with black truffle and graphite, quite Pauillac-like in style, which is no surprise given its location. This is very focused and perhaps understated compared to the 2016, yet its freshness and vivacity are undeniable. "Streamlined, cool and linear" I wrote at en primeur... I have no reason to alter that sentiment."

94 Jeb Dunnuck - jebdunnuck.com

"The grand vin 2017 Chateau Cos D'Estournel checks in as 66% Cabernet Sauvignon, 32% Merlot, and 1% each of Cabernet Franc and Petit Verdot brought up in 60% new French oak. It's a classic 2017 that shows the straight, very classic style of the vintage with its medium to full body, ripe, present tannins, and solid spine of acidity. Beautiful cassis, green tobacco, graphite, and cedar pencil notes all emerge from the glass, and as with the Pagodes, it's still tight and reserved on the palate. Reminding me of the 1996 with its classic, balanced style, give bottles 5-7 years and enjoy over the following two decades."

94 Wine Spectator

"Bright and expressive, with an extroverted core of loganberry, plum and black cherry fruit racing to the fore, carried by a polished and sleek structure. Reveals a subtle mineral edge through the finish, with alluring black and red tea notes swirling around. The rare seductive St.-Estèphe. Cabernet Sauvignon, Merlot, Cabernet Franc and Petit Verdot. Drink now through 2036. 15,000 cases made. -JM"