My order is on backorder and I'm just waiting for the delivery. I bought 20 packs and plan on passing them around my quilt guild and asking them to evaluate the blades. Sort of our own experiment. I am anxious to see if what I get measures up to all the good reviews I've heard. We'll see. I plan to keep the brand of blades a secret and reveal what they are after they use them and I get responses from the girls.