It helps you get the knack for a consistently correct angle BUT the idea falls apart a bit when it comes to the curve and taper part of the knife and if your knife has an excessively narrow (slicer/boner) or wide (cleaver) width. It will also mark up the sides of your knife which may bother some who are obsessed with the cosmetic appearance of their $150+ Japanese knives--I could care less. 

This sleek, powerful automatic knife sharpening system has a spherical bearing rod guide for easy adjustment and close proximity between the knife and the rod. The cherry hardwood pistol grip provides ultimate comfort and great control over the tool. The key selling point of this product is the incorporation of one fine, one medium, and one extra coarse sharpening stone.
DOUBLE-SIDED WHETSTONE: stone for rough grinding and fine finishing4000 Grit Side: This grit is very fine and please sharpen very slowly. This is to be used after you've created an edge with more coarse grits. This fine grit is able to put an edge on a tool or knife that exceeds just about any commercial edge you'll find. QUICK AT WORK & MULTIPURPOSE USE: Effective for all types of knives, including kitchen, household, sporting and pocket knivesGUARANTEE THE SAFETY: Coming with a non-slip, high quality silicon and bamboo base. The base holds the sharpening stone securely and fixed in one placeATTENTION: If the bamboo base is wet, please air dry for avoiding moldy, because it is not used for a long time (Regular sharpening drastically improves cutting perform.

The Chef’s Choice 15 Trizor XV EdgeSelect is one of the best reviewed knife sharpeners on the market, and for good reason. If you have invested in high quality knives over the years, then this is the sharpener that you need to keep that investment in good shape. The unit is not the easiest to use at first, and it is not the best buy for every kitchen. However, if you are looking for performance that is slightly better than the norm, you will definitely get it from the Trizon.


That’s not to say that you need one of these knife sharpeners—as we note below in the next section, you may prefer another type of sharpener, one that arguably produces an even better edge. But the simple, foolproof sharpeners we’ve picked here will satisfy most people, and they all do the job quickly. That means you’ll be far more likely to use one of these, and that means you’ll always have sharp, safe, effective, and enjoyable knives at hand.
Finally, when you learn how to sharpen a pocket knife becomes reality, you'll ultimately see the difference in your blade. Every sportsman and kitchen guru should learn how to sharpen a pocket-knife the proper way without "nicking it" or "shaving the edges" off too much you end up with a short and stout blade. Consequently, selecting the proper pocket-knife sharpener is important so learning the in's and out's of how to sharpen a pocket-knife before and after using it is all in the practice as well as in the sharpener itself.
Ease of Use – Are you willing to take the time to learn to properly sharpen your knife? When looking for a sharpener, you should remember that some of these products are capable of operating for you, while others require a little bit more effort. If you’re not willing to put in the effort, you should rely on devices that are effortless, such as electric and pull-through models. Knife sharpening systems are fairly easy to use, as well!
Three other positives to the Brød & Taylor: First, you can use it to sharpen serrated blades by tilting the blade in the horizontal plane so that only one carbide (generally the one on the right, given how the edges of most serrated blades are ground) contacts the metal. Second, it’s ambidextrous, because lefties simply have to turn it around to engage their dominant hand. And third, unique among our test models, it can sharpen blades all the way to the heel, because the left- and right-hand carbides meet at a single point. (The ⅜ inch of the blade that our Chef’sChoice picks leave unsharpened at the heel is largely ignorable, but praise where praise is due.)
For a quick jump, you can see on the chart below made by Steve Bottorff described on his popular book Sharpening Made Easy: A Primer on Sharpening Knives and Other Edged Tools. The book tells many things about knife sharpening, sharpening system and DIY guide how to sharpen razor-sharp edges. If you want to surf deeper into the world of the sharpener, then it is one of a must-read book for you. For you who dwell in the Mainland or around the United Kingdom, you can buy the book through the link below.
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