Although it' s housing is made of less durable plastic, it's interior workings are solid. This results in a shot topped with approximately one-quarter inch of crema, the golden foam that's the hallmark of good espresso. Durable components are key . Metal or heavy plastic housing is better than lighter-weight plastic housing, and boiler systems are generally more powerful than thermal blocks or coils. Aluminum portafilters don't hold heat as well and are less durable.
More power is better .
Other important features include a cup-warming surface, detachable water reservoir, removable drip tray, ease of use and ease of cleaning. Design is an important consideration for those who plan to make their machine a showpiece in the kitchen or dining room. If you have space constraints, be sure to measure your counter space before making a purchase some of these machines can be pretty big. The Capresso grinds, doses, tamps, extracts, and even dumps the spent grounds for you. Experts say pods are expensive, don't fit in all machines, and aren't always fresh.