I have used a lot of sharpening systems out there and this by far has been the quickest and cheapest out there and it actually works well. I bought my wheels as I am on an extended vaccation and didnt bring any knife stones or sharpeners with me. I got it today and it took me like 5-10 mins to figure out whats what (mostly because my grinder isnt bolted down and it likes to wander around the table a bit) but once I figured out what to do, I have been able to put some fairly sharp edges of about a 1/3 of my kitchen knifes so far in no time flat. It's too late for me to play more with it but I'm quite pleased with it. I want to be able to put hair popping edges on my knifes but so far, I have only been able to get them to wittle hair. perhaps its the metal? Oh well, I'll play more with it and hopefully I can figure out what angle is the right dangle.