At first, the whole building seemed to me quite complex, but after a short time I had convinced the design principle.
The rail ensures that I can rub evenly with no slipping. I have to hold or press firmly the rub not the same, the force decreases.
Rubbed falls directly into the plastic box, so everything was very clean and no losses.
Of course you can use the grater even without the plastic box, but you get used to fast on the combination and their benefits.
The design of the tower prevents very well that the fingers come into contact with the rubbing, yet the grinding to vegetables is rubbed until the last bit.
In some reviews the sharpness of the knife was criticized. Either EMSA has touched up there or I can not share these opinions. In my 3 Reibeinsätzen everything was very sharp, which also hard vegetables such as carrots, cabbage, or even nuts were properly rubbed or grated. Rubbing went slightly out of hand without me pressing violently or had to start several times.
Conclusion: Anyone looking for a multifunction grater, working cleanly and safely without much effort, which can access here.