We consider a thinner chassis better because it makes the product more compact and portable. Thinness is a feature highlighted by many manufacturers of mobile devices, but it is essential for a wide range of products.
The machine automatically deposits the used coffee grounds or pods into the dump box after extraction. The dump box capacity shows how many drinks you can create before it is full.
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 transparent water tank you can easily see when it needs to be filled up. This is important as attempting to make an espresso with an empty tank can damage the machine.
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.
A higher number of grind settings gives you more flexibility when choosing the fineness of your ground coffee. The particle size is important as a grind which is too coarse can produce weak tasting espresso, whereas a grind which is too fine can lead to a bitter taste.
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.