We need to choose the energy efficiency class wisely! An E-class fridge require relatively low energy and are therefore cost-effective for the user.
The smooth running of the air fan improves air circulation and hob cooling efficiency. The hob does not heat up much and the air fan runs with much less noise.
It can never get any simpler than that - if we want to set the temperature inside our freezer, then all we have to do is to turn the inner knob to the left. Adjusting the cooling capacity is amazingly easy and intuitive, as we never have to worry about setting the temperature precisely - it is enough to choose one of the predefined levels. Since the knob is placed inside, the front remains nice and orderly.