The 1988 Isosceles, made from a blend of 58% Cabernet Sauvignon, 30% Merlot, and 12% Cabernet Franc, is an outstanding wine, with super concentration, a big, herbaceous, blackcurrant, coffee, and smoky-scented bouquet, lush, full-bodied, highly extracted flavors that display soft tannins and just enough acidity to provide balance and delineation. Approachable now, this impressively constituted wine should easily last for 10-15 years.