Coffee Machines: Is a Separate Grinder Worth It?

Short answer

If you are going to use a non-pressurised portafilter, it is essential: a uniform grind contributes more to the result than moving up a machine range. With conical burrs from around 100-140 € you will already notice the difference. If your machine takes capsules or has a pressurised basket, you do not need it.

Capsules or beans: the real cost per cup

Here the numbers are clear. A closed-system capsule costs between 0,30 and 0,45 €; own-brand compatibles come down to 0,15-0,22 € but with uneven quality. A kilo of freshly roasted whole beans costs 15-25 € and yields around 55 double doses of 18 g, that is 0,10-0,15 € per cup. At two coffees a day, the annual difference is around 150-200 €: a 400 € bean-to-cup machine pays for itself in a little over two years against capsules. Capsules win on convenience, zero cleaning and zero learning curve; whole beans win on cost, freshness and quality ceiling.

Spares, warranty and lifespan

Before buying, check three things that decide whether the machine lasts you eight years or three: that there are spare seals and filters on sale, that it has an official service network, and that the brew group is accessible to clean it. The brands with the best spare-parts availability on the Spanish market are De'Longhi, Philips/Saeco, Krups and Sage. Most manufacturers also honour a 2–3 year warranty, depending on your country’s consumer protection rules, and with coffee machines it pays to keep the receipt, because limescale damage is often excluded if you cannot prove maintenance.

Steam wand: classic lance or automatic system

If you like cappuccino or flat white, this decides your purchase. The classic steam wand forces you to learn to texture the milk (create the vortex, not make bubbles) but gives café-quality microfoam and works with plant milks. The automatic systems systems such as LatteGo or a cappuccinatore handle the milk on their own, with no technique needed: the result is decent and very repeatable, but foamier and less creamy. One practical detail: LatteGo comes apart into two washable pieces, whereas milk circuits with internal tubing demand cleaning cycles and end up smelling if you neglect them.

Mistakes that ruin coffee (and it is not the machine)

Five mistakes explain most bad coffee at home: using months-old ground coffee kept in the opened bag; very hard water or tap water with chlorine; do not warming the cup, which drops the temperature of the drink by 8 to 10 °C at a stroke; not purging the group head before extracting; and tamping with uneven pressure, which creates channels where the water escapes without extracting. None of them cost money to fix. Before changing machine, correct these five: in most cases the problem was never the appliance.

• Build quality and materials
• Recent verified reviews (3-4 stars included)
• Warranty and returns policy
• Current price against its historical average
• Seller reputation
• That the key features match how you will use it (Travelling)

Water hardness and descaling: what kills coffee machines

The number one cause of breakdowns is limescale, not use. Across much of the Mediterranean coast and central Spain the water exceeds 25-30 °fH, and at that hardness a machine without a filter needs descaling every 1-2 months; with soft water (<15 °fH) you can stretch it to 3-4 months. Use filtered water or bottled water with weak mineralisation (dry residue below 100 mg/l), set the hardness in the menu if the machine allows it, and do not ignore the descaling warning: once the heating element scales up, the water no longer reaches temperature and the coffee tastes thin long before the machine actually fails.

Criteria	Sage Barista Express ImpressOur choice	Chemex Classic 6 Tazas
Ideal for	Balanced, all-round use	Travelling
Strong point	Value for money	Specific features
Ratings	Very positive and numerous	Positive
Guide price	from ~128 €	from ~80 €
Recommendation	Our choice	Best alternative
View on Amazon	See price →	See price →

The 9 bars of pressure that really matter

Almost every entry-level machine advertises 15 or 20 bar, and it is a marketing figure: that number is the maximum pressure of the vibration pump, not what reaches the coffee. A correct espresso is extracted at 9 bars at the group head, and above 11-12 the extraction turns bitter because it drags out compounds that should stay behind. A 15 bar machine with a properly calibrated OPV valve makes better coffee than an unregulated 20 bar one. When comparing, ignore the bar figure and look at whether the portafilter is pressurised or not, and at temperature stability.

Glossary: the terms you will see in the specs

Portafilter

The part where the ground coffee goes. Pressurised (with a valve) or non-pressurised (barista type).

OPV

Over-pressure valve that limits the pressure reaching the coffee, ideally to 9 bar.

PID

Controller that keeps the temperature steady at a fixed value instead of swinging.

Bloom

First pour of water in manual filter brewing so the coffee degasses, around 30 seconds.

Microfoam

Textured milk with invisible bubbles and a paint-like texture, the basis of latte art.

Channelling

Defect where the water goes through the coffee at a weak point without extracting it properly.

°fH

French degrees of water hardness. Above 25 the water counts as hard.

So which one should I buy?

With the doubt cleared up, the choice is simpler than it looks: the Sage Barista Express Impress is the hardest option to get wrong, and the Chemex Classic 6 Tazas fits better if your priority is travelling. With coffee machines the useful range starts at around 80 € and the best balance is usually close to 128 €; above that it only pays off if you are going to make the most of specific features. Check the current price before deciding, because it changes often.

Frequently asked questions

How often do you need to descale?

It depends on water hardness: with hard water (above 25 °fH, usual on the Mediterranean coast and in central Spain) every 1-2 months; with soft water, every 3-4. Using filtered or weakly mineralised water multiplies the machine's service life.

What water should I use in the machine?

Weakly mineralised water, with dry residue below 100 mg/l, or filtered tap water. Distilled will not do: with no minerals the coffee tastes flat and some level sensors cannot detect it. Water is 98% of the cup, so changing it makes more difference than moving up a machine range.

What is the difference between espresso, lungo and ristretto?

It is the same dose of coffee with a different amount of water. A ristretto is around 18 g for 25 ml and comes out dense and sweet; a double espresso, 18 g for 36 ml; a lungo goes past 60 ml and drags in more bitterness because it keeps extracting when there is nothing good left. If you want a long, mild coffee, go for an americano instead: espresso with hot water added.

How often do you need to descale?

It depends on water hardness: with hard water (above 25 °fH, usual on the Mediterranean coast and in central Spain) every 1-2 months; with soft water, every 3-4. Using filtered or weakly mineralised water multiplies the machine's service life.

What water should I use in the machine?

Weakly mineralised water, with dry residue below 100 mg/l, or filtered tap water. Distilled will not do: with no minerals the coffee tastes flat and some level sensors cannot detect it. Water is 98% of the cup, so changing it makes more difference than moving up a machine range.

Should I go for the Sage Barista Express Impress or the Chemex Classic 6 Tazas?

The Sage Barista Express Impress is the most balanced option and the one we recommend by default. The Chemex Classic 6 Tazas makes sense if your priority is travelling. As a budget reference, the useful range starts at around 80 € and the best balance is usually close to 128 €.

By the Café en Casa Team · reviewed by

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