Many coffee drinkers fail at making an exceptional cup because they do not use a sufficient grinder. The grind type determines how quickly the water passes over the grounds, and different brewing systems require a specific grind. For example, espresso requires a powder-like grind so that the surface area can open up and extract the flavors and oils within the 20-30 seconds it takes to pull a shot. A simple rule to follow is: the shorter the brew time, the finer the grind. It is essential to have a proper grinder to achieve your specific brewing machine's ideal grind level.