In the shop then the shock: Such grindstone cost around 50 EUR. Next to it was this "grinding aid" for almost 30 EUR and promised simple grinding for you needed any artisan talent. It looks good, too. I slammed it and not bereuht. One pulls the knife Duch two slots in which each put two wheels. For this you should have some feeling for the right pressure, the problem with the correct angle has not, however.
The result I have checked with the paper cutting test. An approximately 2-year-old knife was sharp again as after purchase. Before it has tomatoes rather than crushed cut, now the hits again.
Two small fly in the ointment:
Downer 1) Due to the design you can diameter, which are thicker towards the handle, do not grind until the end of the blade. Approximately 1 cm gleibt as unpolished. For large diameters is insignificant, with a small paring knife of 5 cm length, I find it somewhat unfortunate to lose 20% of the cutting surface.
You can reduce the distance but by removing the cover of the grinding wheels. But then you have to work especially appealing. That would be the reconciliation to
Downer 2) The cover of the grinding wheel could be a little more stable. The Plasik is indeed indestructible, but the closure jumps quite easily.
I would buy it again, because he is "relatively" cheap and very easy to use.