Knives are not only sharp, but damage

Advantages of Twin Sharp:

- Blunt knives with a smooth edge are sharp
- Very good price
- Ease of use

Disadvantages:

- Unfortunately, the blade of a knife will break through the Twin Sharp. The result marks and grooves on the edge and repeated processing of a knife is made of a dull knife sharpness "Saw"
- The knife itself is so damaged during sharpening and expensive knives lose enormously in value

Conclusion:
Cheaply-knives can be sharpened with the successful TWINSHARP indeed. The sawing works here really sharpening and at 5-knives, it depends on the quality of the cutting is not like that.
In contrast, the cutting knives expensive damage and in extreme cases, the cutting will be destroyed.

So overall not recommended.