Baristas generally operate a commercial espresso machine, and their role is preparing and pulling the shot; the degree to which this is automated or done manually varies significantly, ranging from push-button operation to an involved manual process. Espresso is a notoriously finicky beverage, and good manual espresso making is considered a skilled task. Further, preparation of other beverages, particularly milk-based drinks such as cappuccinos and lattes, but also non-espresso coffee such as drip or press pot, requires additional work and skill for effective frothing, pouring and most often latte art.