Full beans retain their taste and aroma far longer than pre-ground selections, making a reputable espresso grinder indispensable. Burr grinders, in particular, are very advisable mainly because they create constant particle sizes, ensuring even extraction during brewing. https://terramaymio.wixsite.com/coffematics/post/the-evolution-of-drip-coffee-how-modern-coffee-machines-are-changing-the-game