We have a Harbor Freight within easy walking distance of our apartment, so I could not resist buying a couple of packages of the blades. Yes, they were indeed very inexpensive, but the first one I tried dulled after cutting one quilt top. I changed blades and found that the second one dulled after one quilt top, too. Having to change blades after each quilt top would wind up being just as expensive in the long run as using really good ones from the quilt shop, right?