The quality of woodworking (and IMO electronics) products. I hadn't heard of Whiteside until recently and wanted to give it a try. I use a Bosch router and tried it on a cabinet I was building and at first I missed the finish as I didn't feel any friction. Then I noticed that he had cut off the edge that was sticking out nicely. The cut is buttery smooth! I was shocked and really enjoyed using this beat! Now I'm addicted; While I probably won't buy all of the Whitesides, the beats I use often are definitely worth the cost/investment in the long run. Other cheap bits I've had burn marks, but this one left no marks and the blade didn't feel dull.