Before I began recommending it to my clients, it was actually a customer, who has since become a friend, who introduced me to Cos!
I was working in a restaurant where we had eight or nine vintages of Cos d’Estournel on the wine list, but I hadn’t had the opportunity to taste a single one. One night, the client in question ordered a Cos 1999. Upon tasting it, he told me it was probably the best wine he had ever had and that he wanted to save it for the end of his meal. Then he asked me to open a Cos 2010. So I was lucky enough to taste two incredible vintages of Cos d’Estournel and make a new friend in the same evening!
Since then, I have of course tasted many different vintages, but given the emotions I felt upon this first tasting and the friendship that resulted from this encounter, it remains my most precious memory of Cos d’Estournel.