What to Look For in a Professional Espresso Machine You'll need a machine with the capability to control the pre-infusion. This is essential to develop flavor. PID temperature control is also a feature that many coffee experts look for in a professional espresso machine. If you're planning to hire baristas https://coffeeeuk47372.blogtov.com/10296773/14-questions-you-re-anxious-to-ask-buy-espresso-machine