These systems are great for someone with little interest in knowing how to sharpen who wants to do their sharpening at home. I wasn’t going to say anything, but a friend of mine just asked basically the same question and I’m going to go all “crotchety old man” for a minute. (If that’s allowed from a 33 year old :bigsmile: )
I repeat, if you or anyone else buys one of the countless jigs or systems available you rob yourself of an amazingly valuable skill.
If you can solder, or run a machine tool, or learn how to use your cell phone, or walk and chew gum, chances are that you can freehand sharpen. There are tons of videos online showing how it’s done, so I’m not going to clutter the Internet with another. You want to find a video showing someone who looks like they’re trying to cut a thin slice of the surface of their stone off when they sharpen. Watch it a few times, and then prepare yourself and your cheapest kitchen knife with the straightest edge profile for some abuse. Use a sharpie to learn how to control your angle. Buy the largest stone or diamond impregnated block you can afford (I recommend Diasharp 6” Coarse/Fine for most people. If you want to drop some serious coin, the single sided 8” blocks are much easier to use but about $50 each) and attach a 6-12” length of an old leather belt to the edge of a 2x4 with some spray adhesive and load it with green polishing compound (or 1-3 micron diamond loaded oil for those that want more bling). For $37 and an afternoon with a sore wrist you’ll be moderately proficient at freehand sharpening, and if you keep practicing and moving to more curved shapes you’ll get to the point where you can literally sharpen a knife almost anywhere. As a side benefit it will be naturally convex which is very durable and less prone to drag in a cut.
I’m trying to save you from finding out the hard way that sometimes an old school skill is more useful than new technology. I have a 10” Jet wet sharpener that I bought to sharpen mostly knives because I was horrible at it freehand. Once I realized that wasn’t going to solve my dull knife problem except when I was in the garage I sucked it up and started practicing. Once I felt like there was little danger that I was going to ruin a knife, I started taking my sharpening stones and a strop everywhere in a little 13” toolbox. Any time someone mentioned having a dull pocket knife or dull kitchen knives I’d offer to sharpen them for them. Most people sit and watch in amazement, or share stories of their dad or grandparents sharpening things. At this point I will actually sharpen knives for people on their coffee cups to prove to them that sharpening technique is worth learning and doesn’t require expensive tools if you have enough patience.
My expensive Jet sharpener gets dusted off a couple of times a year for chisels, otherwise I wasted around $300 on a fantastic tool that I don’t need anymore. It really does make things wickedly sharp, although only ever with a hollow grind, which although easier to strop back to sharp is more brittle than a convex edge.
Now if you read my entire post, here is the fine print at the end. Some people have two left hands, with no thumbs. Others really don’t care to know technique and just want to be able to maintain their knives at home. If you are one of these people, then kudos for doing it yourself and not paying someone else to do it. I highly recommend a jig like this that is fully guided. With good stones and some care it should work for you for a pretty long time. Things to watch for would be the sheet metal bends opening up, rust, and getting good stones with good progression of grits.
Good luck! I hope that most importantly whatever you end up with fits your needs and budget.