I have an Edge Pro. It changed the whole kitchen-knife game.
After a time of using it on the kitchen knives, my wife I were talking about cutting potatoes. It seemed like they were soft and, maybe, we left them sitting in the bin too long. It, finally, dawned on us it all boiled down to no longer having to use knives that you had to throw all your weight on, and rock back and forth, until the potato split, making all the difference.
I've come to enjoy sharp blades so much I invested in a couple high end pocket knives with steels that hold the edges better. The first had SV30 steel and I notice a significant difference between the life of an edge using it versus my old bucks and such. That impressed me
enough I bought a Spyderco Paramilitary with the 110 steel. It makes the SV30 look like a toy. Long after the SV30 would have been dull from cutting
cardboard or something, the 110 steel blade will still shave hairs off your arm.
While I was down the "better knives an better sharpeners" rabbit hole, Wicked Edge had a special on a new sharpener. All the other Wicked Edge sharpeners would have cost somewhere between $600.00 and $1,200.00 (or more) to get in. This one, the WE40, was on special for $200.00 and came with two sets of stones. After a two month wait, it came. It was worth the money. It's quick and effective.
I like the Edge Pro, Wicked Edge and other non-electrical sharpeners because they insure you don't change the angle, which, during sharpening, can set you back or leave you with a less than sharp blade. Too, I like them because they don't eat a lot of valuable metal.
What we tend to forget is, that blade gets thicker, as it goes up to the back. So using the same angle gives a different angle than it would if the blade were, say, 1/4" wider when new. For this reason, blades, eventually, have to be re-profiled, to thin them back down.
The importance of blade thickness can show in something as simple as cutting cardboard. I have a good knife with a back that is a bit over 1/8" thick. If I stab cardboard straight down and pull the knife through, I get a LOT of drag. If I tip the knife so only a bit of the blade is going through, it's like the knife had just been sharpened.
All that aside, one of the other very important tools for a knife is, caring for it. Don't throw it in a drawer full of edge eating silverware, other knives, or what have you. Use a knife holder, whether a block or magnet. This applies to washing them too. Don't throw them in a sink with other kitchen utensils.
If you can, use
wood cutting boards. NEVER a glass one, and a plastic one only until you can get good wood ones.
If you avoid abusing them, your knives will need far less frequent sharpenings.