Best Coffee Espresso Machine - Prosumer Models As the market for espresso expands, so do consumer choices. Prosumer models of several commercial machines are currently available to consumers. These heavier systems require more precision in the user's grinding, tamping and extraction times, but they do the majority of the work. https://coffeee76933.izrablog.com/30380789/the-under-appreciated-benefits-of-coffee-espresso-machines