What to Look For in a Professional Espresso Machine You'll need a machine that can be controlled the pre-infusion, which is essential to develop flavor and aroma. PID temperature control is an attribute that many coffee experts look for in a professional espresso machine. If you plan on hiring baristas https://www-coffeee-uk81692.blog2news.com/30370449/a-buy-espresso-machine-success-story-you-ll-never-imagine