Guide · 9 November 2026
Understand first, buy later: why we put the brakes on
An expensive machine does not make a good espresso on its own. Why we show you the Barista Course first, what a practice machine is for and which questions you should answer before buying. — by Dieter Eitz
Many people buy their first portafilter machine and then face an espresso that tastes sour, bitter or watery. The disappointment is understandable, but often the machine is not the cause. An espresso comes from several variables that have to fit together: bean, grind size, dose, time and temperature. Anyone who knows these variables gets a lot out of a simple machine. Anyone who does not will hardly get reliably good espresso even from a very good one. That is why we first show you how espresso works, and only then what you can buy.
1. Why price alone decides nothing
An espresso machine delivers hot water under pressure, as evenly as possible. What ends up in the cup is decided mostly before and beside it: by the freshness of the bean, by the grinder and by what you do with the ground coffee in the portafilter. A better machine can hold the temperature more precisely, heat up faster or steam more powerfully. But it will not forgive a wrong grind size or unevenly distributed grounds. These are exactly the mistakes that are among the most common at the beginning.
2. Learn first: the Barista Course
That is why the navigation on omaneo.de shows “Learn” first, with the Barista Course, and only then “Buy”. It has eleven chapters, from the prelude through espresso and the bean, grind size, the machine, the puck and dialling in to milk foam, latte art, drinks and mastery. You need no prior knowledge and no registration. Petra, our AI voice, guides you through the chapters.
From our point of view, dialling in is the most important chapter for everyday use: you set the grinder so that your bean runs through your machine in a suitable time. If the grind is too coarse, the water runs through too fast and the espresso turns thin and sour. If it is too fine, it only drips, and it turns bitter and harsh. In between lies the range where it tastes sweet and round. Once you have experienced that yourself, you understand why the grinder matters so much.
3. Then practise: a machine that shows your mistakes
Theory does not replace practice. Nobody learns the piano on a concert grand, and nobody has to learn espresso on the most expensive machine. For practising, you want a machine that shows you what you have changed and that you can try out without hesitation. If you change only the grind size with the same bean, you should be able to taste the difference, without the machine absorbing or masking anything.
Our GUDRUN is meant for this role. We call her a teacher, not a cheap alternative: she is there to show you cause and effect, so that you do not guess but know what the cause was. What she brings for this is described on the page “The Teacher”.
4. Do not forget the bean
Ground coffee loses its aroma quickly, because the surface area grows many times over when it is ground. That is why we supply our coffee as whole beans, in 250 g, 500 g or 1 kg, and you grind at home, just before brewing. The only exception is the Regionals: they come in 500 g and, on request, ground to suit. For espresso, your own grinder is worth it: with it you can adjust the grind size yourself when the bean or the machine calls for it.
5. Then buy: the questions before the purchase
Once you know the basics and have practised for a while, you shop differently. You know what matters to you and can read data sheets. These questions help you choose:
What do you mostly drink, just espresso or often milk drinks? How many cups do you make on a morning, and do guests join in? How much time do you have until the machine has to be ready? Do you want to set the temperature yourself? And do you already have a grinder that is fine enough and adjustable in small steps?
The answers show which design suits you. What single boiler, dual boiler, thermoblock, E61 and PID mean is explained in the article “What happens inside the machine: single boiler, E61, PID, flow control”.
Why we do it this way
For us, a good espresso is a matter of setting things right: of the grinder and the machine as much as of your own attitude, the way you approach it, curious, patient and ready to try things out. A purchase that suits you gives you pleasure for longer than one that only looks good. That is why we put the brakes on a little at the start and let you understand first.
Your next step
Start with the Barista Course, chapter by chapter, and try dialling in with your current equipment. Note down dose, time and taste. When you then know what you are missing, our AI advice helps you find the right machine.
Learn → Barista Course, eleven chapters, no registration
Practise → on a machine that shows you cause and effect
Bean → buy whole, grind just before brewing
Buy → first answer your own questions, then choose the design
