The William Heaven Hill 15 Year 54.5 (which is the 9th Edition) is a highly-regarded, cask-strength bourbon known for its deep caramel, toasted oak, and dark fruit flavors, balanced with hints of spice and a long, warming finish. Reviewers praise its robust character, smooth, velvety texture, and overall complexity, making it a must-have for collectors and a testament to Heaven Hill’s craftsmanship.