Have made numerous homemade jigs with varying levels of success, but NOTHING like this. Coupled with the Freud 1/4 & 3/8 blade set, next to near perfect results are well within reach. Spent some time with practice cuts and materials which proved well worth the effort, just finished my first application of the box joint and can not say enough about the accuracy of the cut. A true rival of the dovetail joint, with incredible appearance as well too. Well worth the investment, but I stress the results are a world better with the right blade set, a dado set will make the cut, but near as clean.