What to Look For in a Professional Espresso Machine You'll want a machine that can control the pre-infusion, which is essential for establishing aroma and flavor. PID temperature control is also an option that coffee experts are looking for in a professional espresso machine. If you plan to hire baristas https://wwwcoffeeeuk05549.blogolenta.com/26708851/9-signs-you-re-a-buy-espresso-machine-expert