Cuts very well.
After a lot of trial and error I found that concentrated Simple Green not diluted with water works very well and the stone does not rust at all. The pictures illustrate the hump in the middle of the 1000 grit side, with a corresponding depression on the 300 grit side. I used the stone dry to stage the picture to illustrate the point.

Great sharpening tool!
My husband, for whom I ordered this tool, absolutely loves it. He saw several videos on sharpening tools and decided to get his own sharpening tool. After a few tries, he was very excited about his results. He really loves it and is so glad he got it.