These machines typically have built-in grinders that grind coffee beans on demand. The ground coffee is then compacted (tamped) into a portafilter, and the machine automatically controls the water temperature, pressure, and extraction time to produce a shot of espresso. Some models also have automatic milk frothing systems for making lattes and cappuccinos.

Yes, most fully automatic machines allow you to customize the strength and size of your coffee. You can adjust the coffee-to-water ratio, water temperature, and sometimes the grind size to suit your preferences.