What to Look For in a Professional Espresso Machine You'll need a machine that has the capability to regulate the pre-infusion. This is essential for the development of flavor. Many coffee experts look for PID temperature control in the best machines. If you're planning to hire baristas with no experience, https://www-coffeee-uk76523.p2blogs.com/29166323/11-methods-to-refresh-your-buy-espresso-machine