Though preground coffee is convenient, it'll never give you the same fresh flavor you'll get from grinding your own beans at home. Especially if you've invested in an espresso machine or a drip ...
Whether it’s at your own pre-coffee expense ... It takes a couple of rounds to grind a full bag of beans (how I do it, as opposed to per serving) but works quickly at about a minute per turn.
If you're a coffee ... beans to an exact degree. The grind size will be adjustable to suit different kinds of beverages, ranging from fine to coarse. Achieving the correct grind size for your ...