works well

Ok, not gonna lie, I was totally skeptical about this. I mean... look at their instructions:

 

HOW TO SHARP YOUR KNIFE? 1.Soak the sharpener stone in the water for about 5 minutes,the stone can fully absorb moisture. 2.According to the different knives to choose your sharpening angle: 17 degree:Razor, Sushi knife, chef knife and kitchen knife; 20 degree:Pocket knife, fruit knife and boning knife; 25 degree:Field knife; 30 degree:Bayonet or field knife; 40 degree:Survival knife 3.Use the bamboo base to hold the whetstone and wear angle guide for knife and prepare for grinding. 4.Use sharpener stone,grinding back and forth according to the blade angle. First use # 1000 grinding 10-15 minutes for a rough grinding, then use #6000 grinding 10-15minutes for a fine grinding. 5.After finish sharpening the knife, wiped the knife with a wet cloth or rinse it with water, and rinse the sharpening stone directly with water and put it in the air to dry.

 

Ummmm... I know English isn't a first language, but I really wish sellers would have someone test it, and then work with them on their wording. 

With that being said, it's not a bad sharpener. You do have to know what you're doing or you WILL ruin a knife.