Our Whetstone Set Pro was also reviewed on the main German knife forum site:
The experience of the reviewer matches exactly with the intended specifications:
A hardness on a similar level than the Naniwa Super Stones, which is softer than Shapton or Naniwa Professional, but harder than most other stones. As a result, grinding slurry can be produced rather quickly, which supports the sharpening process.
A fast speed of grinding similar than a Naniwa Professional (Chosera) stone, and subsequently the fast formation of a pronounced burr.
Many thanks for the review and the video!