I'm a dog groomer and have used the Andis for many years. They've held up so well. Recently I needed to ad another pair of clippers and decided to check if there was a newer, better clipper I should look into. Decided to call and talk with a large, professional clipper repair company that services/repairs many clippers, dryers, etc. I was surprised when he said the Andis is the best bet as far as they were concerned. So ordered another pair. I have never tried the Double K's, but since I only body a clip a small number of horses a year, have been happy w/ Andis. Someday I'll try the Double K's and see how they compare as well.