Simply one of the two cutting insert used (the sharp side direction potatoes, which you can easily feel with your finger), then insert the raw potato, push lever down and in a few seconds the potato is divided into French-like stripes. Until medium potatoes flutschen butterweich by the cutter and you have to spend a large force. For large potatoes, it is recommended to halve these previously along, otherwise they get stuck in the cutting insert and must be rausgefummelt tedious. Otherwise, the cleaning goes smoothly - though not to save space - in the dishwasher.
The only minor complaint: The fries that are so fabricated are that of the thick variety, an alternative application, with which you can still cut narrower fries, would be nice.
Incidentally, I have the second cutting insert at first not found. If someone still goes like this: It is attached to the bottom of your device!
Overall impression: + Simple delicious!