If you are planning to purchase the espresso coffee machine, then you must think of purchasing the same from an online store. Purchasing the coffee machine online would allow you to explore a variety of machines and know the features of each of them, so as to purchase the one that suits your taste. If you are facing the problem in deciding the best one for you then you must read the expert reviews about the different coffee machines. You may visit http://www.espressogusto.com/keurig-rivo-r500/ for knowing about one of them. These coffee machine come in different sizes and capacities thus if you do not have much use of the same then it is advisable to purchase the one offering capacity of two to three cups.