Since I do not use expensive and high-quality knives, I think the price / performance ratio is appropriate. I especially like the Saugnapft, the "bomb-proof" attached to AnySharp on the stove, so you do not have to hold him to grind. It can be thus also for example on the inside of a (smooth!) Store cupboard door.
From the degree of severity and the time interval until the next sharpening can I find the "knife-mouse" by Tupper but definitely better and will probably spend about 10 EUR more next time.
All in all, still a solid and useful knife sharpener.
