The Viper Sharp system will up your knife sharpening game. The Viper Sharp has some really nice refinements. First of all I really like the infinite height adjustment. Other sharpeners have set height adjustments, so if your knife is too wide or has a different angle on the blade, then you end up reshaping the sharpening angle to fit the sharpener, and not the blade. I also like how easy it is to flip the knife holder over, and how solid the knife holder is. I’ve used similar systems where the blade has come loose before the job was done. You pretty much are left with starting over with at that point. So with Viper sharp you get a precise, solid knife sharpener.