Wine Advocate: The 2015 Vieux Château Mazerat, which you could view as Jonathan Maltus' "second in command" after Le Dôme, is a blend of 65% Merlot and 35% Cabernet Franc picked on October 6 and 12 respectively, and matured in 80% new oak. It has a tightly wound bouquet with black cherry, bilberry and cold stone, a floral note emerging after a minute in the glass. The palate is medium-bodied but there is more fatness and density here compared to Jonathan's other 2015 single parcel offerings from Le Pontet and Le Carré. Plenty of "rondeur" here, perhaps because the pH is just a little higher, the finish well balanced, clean and fresh. I look forward to retasting this in bottle. 91 - 93 Points
Vieux Chateau Mazerat is stamped with class. Power and elegance as well as a sense of place. Production is limited with vinification being reactive. The resulting wine is powerful, complex and persistent.