Been making knives for years.Never used a jig because they were relatively expensive and I flat out didn't need one - I can do just fine by hand and eye... But that's not a fast process.Now orders are backing up and you know what? I took this thing for a test drive and I think...I think I am going to let it make me lazy!Not saying instant perfect grind - I'll still have to do a fair bit of touching up - but it ain't too shabby in it's results.Will save me a lot of time.Price was really good.Well put together.Well thought out.Good packaging.Shipped quick.No instructions but it ain't exactly rocket science and the pics and video on Amazon are pretty self explanatory. I looked at Amazon, put it together and mounted a blade in 10 or 15 minutes.No real learning curve unless you're new - I went to work with it right away and got to say I am pretty happy with the results. About 20 minutes compared to 2 hours or so I would have spent free handing it.Good tool.Definently recommending it for us old time snobs who are getting lazy lol.