As the name suggests, this limited batch bourbon whiskey was finished in maple wood casks, and was a groundbreaking, experimental release at the time, hence its collectability. In the early Master's Collection releases, such as the Sonoma-Cutrer Pinot Noir and Chardonnay finish, as well as the Maple Wood and Four Wood finishes, bourbon connoisseurs hadn't experienced such unusual and interesting techniques, whereas now they are becoming more commonplace.