I am relatively new to Wet shaving and a little over a month ago I purchased a Merkur 34G and a sample pack of blades. This included Feather, Astra, Gillette blue, Persona, Kai, and Bluebird. Since I hadn't heard much about Bluebird, I saved them for last. Well today was the day. I had been using the Gillette for a week and it held up really well. When I put in the Bluebird it gave a worse shave than the week old Gillette. I may try one more out of the pack just to see if it was a bad blade, but if that is as bad I will never use one again.