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What to Look For in a Professional Espresso Machine You'll need a machine that has the ability to regulate the pre-infusion. This is essential for developing flavor. PID temperature control is an option that many coffee experts search for in an espresso machine that is professional. If you're planning to hire baristas with little experience, you will need a machine that is easy to train. This is important when you are planning to operate a drive through coffee shop. Ease of Use