I have use the Harbor Freight blades for years and sharpened them with my manual sharpener for just as long. It is the price that has kept me using them. I have been using less of them as of late and have a good rotary cutter that came with a few blades when I got it some time ago. Having used Harbor Freight for so long I forgot what quality was all about. This change a few months ago over to Quilter Select has been sweet. Even with that I have been doing less cutting because of my Accuquilt cutter so the rotary cutter is getting less of a workout these days.