Espresso coffee makers work by either pump or steam and therefore bar pressure is an important factor - the higher the pressure the better the coffee. Pump machines produce a better quality, nicer tasting drink and therefore tend to be more expensive; however there is still a variation in prices between the different models. Only the pump machines are able to produce a Crema. There are a considerable number of coffee machines on the market so make sure that you identify the features and functionality that you consider most important early on. https://espressoexpert.net/ will help you vastly reduce your shopping time.