Great product. Took a shot on it given the pain it was finding everything for an Old Fashioned during the last couple of months, and was pleasantly surprised at how good this works. Have done with both traditional bourbon and rye and enjoyed both, and really is a quick way to make a cocktail when you don't want to pull out all the traditional ingredients. Also bet this will be great for gatherings and parties, when it's faster to pull out Proof than spend all the time behind the bar.