I'm a novice knife sharpener. I've had to unlearn what my grandpa taught me in order to use these. So far, I've had decent but mixed results. I've switched to my cheap 200/400-ish cheap tool stone from harbor freight for cutting a bevel when the blade has either been damaged or did not have a proper bevel. The 400/1000 grit stone in this kit is soft. Very soft. I have bowled it out several times. It makes keeping a steady angle difficult. But these stones at this price point are meant for learning, and for that they serve their purpose.
When a whetstone is used to cut metal, it acts like sandpaper by removing small particles of metal (aka “swarf”) with each pass of the blade over the stone. Therefore, whetstones with more coarse grits cut faster than those with finer grits and, at the same time, soft whetstones cut faster than hard whetstones because each pass of the blade over both types of whetstones not only removes fine particles of metal from the blade, it also removes fine particles from the surface of the whetstone (aka “slurry”) which continuously exposes new cutting crystals. However, if the swarf is allowed to build up on the surface of the whetstone during sharpening, it will clog the stone and drastically diminish its effectiveness. Therefore, some whetstones require water to lubricate the stone and suspend the swarf whereas, other whetstones require oil to lubricate the stone and suspend the swarf.
When attempting to choose a whetstone for sharpening your favorite knife, the number of choices can be mind boggling. In fact, sharpening stones are divided into four distinct categories consisting of natural whetstones and manufactured whetstones which, in turn, are divided into two other categories consisting of oil stones and water stones. Then, there are numerous different varieties of natural whetstones consisting of several different materials that are quarried from different places around the world as well as several different types of man-made whetstones!
You've acquired a good chef's knife, you're using it almost daily to make tasty dinners for the family, and it's stored in a nice knife rack or a magnet for safekeeping. So why stop there? Keeping that knife's edge fine will make cooking not only safer but, let's face it, much more fun. Whether you've spent £150 on a high-end knife or under a tenner on a dinky paring knife, keeping it sharp is crucial. 
A good whetstone and a little practice will keep all of your knives sharp and in perfect condition. The beauty is that it doesn’t take much effort to learn, just a good bit of practice to get the angle right and keep a consistent angle while you’re sharpening. Whetstones are available in department stores or online, and while they range in price based on the fineness of the grit, this thread at eGullet can help you pick a good grit to start with.
Shapton Glass 320, 500, 1,000, 2,000 and 16,000. I have the 4,000, and 8,000, they are absolutely fine, great in fact but I just don’t use them as much as the others. These stones excel on knives made of hard steel, the hardest steel is no match for these. This does not mean you can’t sharpen hard knives on the Naniwa brand of course, you can. I have been using this particular brand of stone for many years and I absolutely love them.
I purchased this set together with the 400/1000 grit stone assuming that some of my knives were quite dull and would need work on a coarse grit stone. Premium Whetstone Sharpening Stone 2 Side Grit 400/1000 | Knife Sharpener Waterstone with NonSlip Rubber Base & Flattening Stone. This is my first wetstone. First off I tried to sharpen my Chicago Cutlery boning knife. This knife is nearly thirty years old, has been abused in may ways and was quite dull. It was very difficult for me to get a burr on this blade, which I attribute to poor technique. Next I moved on to my Henckels Professional S paring and chef's knives. The paring knife was moderately sharp and was modestly improved after working over all three grits of stone. It would cut paper but again it was difficult to develop a burr with this blade. Undaunted I switched to the chef's knife. This knife is twenty years old and has never been professionally re-sharpened. I have sharpened it twice with a Lanksey sharpening system which marred the finish but did put a good edge on the blade. Lansky Standard Coarse Sharpening System with Fine Hones. The chef's knife was moderately dull and had several pits visible on the cutting surface. I modified my technique for passing the knife over the stone and worked the chef's knife over the 400 grit stone aggressively and eventually I was able to get a burr to form from the tip of the knife all the way to the handle. From there it was a simple process of reforming the burr on the 1000 grit stone and then finishing on the 6000. After sharpening, the chef's knife easily and cleanly slices a tomato with very light pressure and is in my opinion very sharp. Not sushi knife sharp but more than enough for the chopping and slicing I expect of it. I'm looking forward to going back and working both the boning knife and the paring knife over again. Don't expect a good result from this product the first time you use it. Watch videos on using a wetstone, expect to spend at least twenty minutes per knife at first, and practice forming a burr. If you can form a burr, you will be able to successfully sharpen your knife.
Sharpening stone set helps you slice through anything with ease when you have a truly razor-sharp knife, chisel, or axe.Made from professional grade Aluminum Oxide, so expensive oil is NOT required; just use some Water and you're good to go. Works better than a diamond sharpening stone for knives.Non-slip bamboo holder keeps everything secure so you never have to worry about the Japanese whetstone slipping off the counter.Whetstone knife sharpener makes all your blades last longer - use the coarse 3000 grit to prep and smoothen the blade then finish honing and polishing with the 8000 side.Slice through anything with ease and achieve the real precision of a pro when you have a truly razor-sharp knife, chisel, or axe.Made from White Corundum, so expensive oil .

Be careful: Don’t move your fingers laterally along the edge, you’ll cut yourself. Feel for a rough area running from tip to heel. Again, it takes time to know what to expect because the best burr will be subtle. Just know that the bigger the burr, the more metal you are removing—more than necessary. Don’t worry, you won’t ruin the knife doing this. You’re learning here, and mistakes are part of the sharpening journey. Learn from them.
Once sufficiently wet, it's time to position the stone on something solid, so it doesn't move about during sharpening. Many come with holders, but you can just place it on a slightly damp tea towel on the table. The stone should be roughly perpendicular to your body, though Warner told me it is sometimes easier to angle it ever so slightly to the right (if you're right handed). 

Sharpal 178N TRANSFORMAN 3-In-1 Diamond Round and Tapered Sharpal 178N TRANSFORMAN 3-In-1 Diamond Round and Tapered Rod Sharpener makes it easy to sharpen all kinds of knives including those with serrations gut hooks fishhooks and pointed tools. Industrial monocrystalline diamond is electroplated in nickel onto a steel base. Sharpen dry. No messy oil needed. Fine 600 grit (25 ...  More + Product Details Close
You will be given access to our useful online learning material: a set of videos and articles to help you improve your sharpening technique. These resources were made by professional knife sharpeners, specifically for beginners and intermediate sharpeners. The articles and videos will guide you and teach you knife sharpening from scratch, also covering more advanced techniques. You can also get in touch with us anytime if you have any questions concerning sharpening specific types knives.

Heres why I wasn't impressed at first. I only used it for a few minutes on each side, which resulted in nothing. I watched a video online with a master chef using his stone, and he sharpened his knife for 10 minutes on each stone before moving up to a finer grit. I took this hint, and used sharpened my knife on each side of this stone for 10 minutes, which led to perfection.
The humble sharpener tends to elicit more divergent opinions than just about any other type of kitchen tech. Everyone, it turns out, has their own take on which type of sharpener works best and why and most serious chefs aren’t shy about voicing their opinion. As you can imagine then there are a number of things most chefs – both professional and amateur – look for in a sharpener in order to ensure they get the one that’s right for them. These considerations include:
I bet those Vikings, relatives of mine no doubt, never had it so good. They never had surated blades to sharpen or needed to wear cool things around their necks to woo the women (they just grabbed them by the hair I guess). I love my stone. So useful and beautiful. I always have spit to wet it with, and I always have a way to sharpen my tool. Wazoo makes high quality products. I give them the highest rating I have. Dudes!
Start off on the rough grit side of the stone. Check the grit on your stone, or the packaging that came with the stone, to identify which is which. In general, whetstones and diamond stones each have different grits on either side. The rough grit side is used to grind the steel down, while the fine grit side is used to sharpen or hone the knife. The grinding process comes first, so you start on the rough grit side.
The thumbnail test (not recommended for novices) - With this test you take your newly sharpened blade and run it oh-so-delicately over your thumbnail. If you feel it digging in even a tiny bit, it’s likely sharp enough. If on the other hand it just slips and slides across the surface of your nail it’s not sharp yet. Again, this test is only recommended for people with lots of experience handling knives and even then they’d probably be better off just grabbing a tomato or a piece of paper.

4. Start sharpening the first side of the blade. With your blade set at the prefect angle, you’re ready to start sharpening. Imagine you’re carving off a slim piece of the stone’s surface. Personally, I bring the blade into the stone. Other people stroke the blade away from the stone. Both ways work, so just use whatever technique you prefer. If the knife blade is curved or if it’s longer than the stone, you’ll need to sweep the blade sideways as you work, so the entire edge is sharpened evenly. Apply moderate pressure as you sharpen. No need to bear down hard on the blade. After you make one stroke, start back at the beginning and repeat. Do this about 6-12 times.

Cutting angle – With a manual stick or sharpening stone you set the angle yourself so this does not factor into the equation when choosing that type of sharpener. When shopping for an electric sharpener however it does. You’ll want to decide if you want your knives to have the 15 degree “Asian” style angle so that you can make precise cuts or the Western standard 20 degrees or 22-degree sharpening angle. Most people will opt for the 20 or 22-degree angle simply because their cuisine doesn’t call for a lot of finesse from their knives and those knives are probably of a heavier Western variety anyway.
So you are going to start at the heel and you are going to time it so that it goes all the way across. You go from one side to the other. You also want to make sure that your stone, I am not going to use as much pressure as I normally would because I cannot mount it on this showcase, you want to alternate from side to side to keep your bevel centered. Some people will take and do three times on one side and then three times on the other, the problem is that your backhand is never as good as your forehand and you end up cheating and you are going to end up with a blade that is offset. That is going to take it and thin down, you are going to get a thin bevel right on the edge. Once you get that V established, you can go from the coarser side to the finer side.
I enjoy these stones so much that the feedback is not a deterrent at all for me, I don’t even think about it. The results are always nothing but top notch, they deliver exactly what I want, some of the sharpest knives I have ever produced were sharpened on Shapton Glass stones. They may be thinner but they last a very long time, they are easy to maintain as well,
We’ve shown you how to keep knives sharp before, and even discussed why water stones are best, but this crash course is quick, fast, and gets to the point. In most cases the most the average person at home can do is either hone their blade with a honing steel, which straightens and lines up the blade’s edge, but it doesn’t sharpen it. Alternatively you could run it through a handheld or electronic sharpener, but depending on the model you use it can do more harm than good.