Sullivan produces wines from Rutherford, the heart of Napa Valley's Cabernet country. The winery's portfolio centers on Merlot and Cabernet Sauvignon, grapes that thrive in this warm, well-drained benchland. The Private Reserve Coeur de Vigne blends Merlot and Cabernet Sauvignon into a structured wine that has drawn attention from Wine Enthusiast, Decanter, and Wine Advocate. The Cabernet Sauvignon Reserve and Cabernet Sauvignon James O'Neil represent the winery's focus on varietal expression, showcasing the depth and aging potential that Rutherford terroir imparts. These wines reflect the region's signature character: ripe fruit, firm tannins, and the mineral undertone that defines the appellation.