I agree with the positive reviews in full to - the grinder is very good. All knives and scissors, which I treated thus, are as sharp as on the first day or even more sharply. A serrated knife I could not raise, nor my ax whose blade is too thick for the guiding of the slider, but that is not the first place to the sander and I have the second part not acquired primary. The 10-year warranty from the manufacturer speaks well for the quality of the grinder.
The features mentioned in the reviews of a buyer "screws for angle adjustment" I still have not found. :-) One correct me if I'm wrong, but the three screws at the front are surely only to secure the management and the grindstones and should at most be solved in order to turn the grindstones, when they should wear one.
To me at least like the product, not least because of the very low price!