What to Look For in a Professional Espresso Machine You'll want a machine which can control the pre-infusion process, which is crucial for establishing aroma and flavor. PID temperature control is a feature that many coffee experts look for in a professional espresso machine. If you're planning on hiring baristas https://www-coffeee-uk02119.pointblog.net/7-things-about-buy-espresso-machine-you-ll-kick-yourself-for-not-knowing-71447537