There are many aspects that make Rocket espresso machines great. Lets go through them.
Also, please keep in mind the Cliff & Pebble equation to quality coffee at home:
Make sure you're buying beans that are freshly roasted & preferably from a local roaster. Stay away from Starbucks and for heaven's sake - Folgers. If you need more help deciding what beans are best for espresso, review our blog post on the subject by clicking the link.