La Marzocco GS3
Ground coffee, especially if freshly roasted and ground, results in much better quality coffee than the kind of results you get with pods or capsules.
Gaggia New Espresso
One of the most important aspects to pulling a great espresso is the amount of pressure used. Aspects such as how tightly tamped the portafilter is can affect the pressure and therefore the overall quality of the extraction. A pressure gauge helps you to adjust your process to achieve a perfect 9 bar of pressure.
It has a steam wand, which allows you to make steamed/frothed milk to create other drinks from an espresso base.
With a cup warmer you can heat the cups before pulling your espresso so that it doesn't go cold quickly, which affects the taste and quality. It also means that you don’t have to manually heat them using hot water.
The device has an electronic display to present information to the user.
A rotary vane pump is most often found on commercial and high-end consumer machines, and offers much quieter operation compared to the more common, vibratory pump.
A hot water outlet is useful as it can be used to heat cups, as well as making americanos, long blacks and teas.
A PID controller controls the temperature of the boiler electronically. It offers a far greater degree of accuracy and consistency than a regular, mechanical thermostat used to control temperature. This is very important as a temperature of around 92°C to 96°C is key to pulling the perfect espresso.
With a larger water tank you don’t have to refill it as often.
La Marzocco GS3
The coffee machine can connect directly to the water supply. This ensures you never have to refill the machine with water.
A higher capacity boiler means that you don’t have to refill it as often.
Rocket Espresso Professionale
After a certain period of being idle, the device will switch to a sleep mode to conserve power.
With a pre-infusion function you get a low pressure of water before it ramps up to around 9 bar of pressure. This gently expands the grinds to get a smooth extraction and to help prevent channeling in the cake.
These buttons can be programmed for different types of coffee such as an espresso, doppio or ristretto. This means once you have mastered a particular style of coffee, you can get it the same every time.
Delonghi EC 850.M
With a double boiler or heat exchanger system, you can brew and steam milk at the same time. This has an advantage over single boiler machines where you have to wait between brewing and steaming for the temperature to adjust.
The time taken to pull an espresso shot is one of four key elements, and should be around 19-22 seconds. Once you have the grind, dose and tamp correct, you can use the shot clock to time the pull perfectly.