What to Look For in a Professional Espresso Machine You'll want a machine which can control the pre-infusion, which is essential for establishing flavor and aroma. PID temperature control is also a feature that many coffee experts search for in a professional espresso machine. If you're planning on hiring baristas https://coffeee-uk40903.mdkblog.com/35500094/10-undeniable-reasons-people-hate-buy-espresso-machine