The Derby Premium DE blade is, in my experience, an okay performer—a blade that lands squarely in the middle of the pack. It doesn't dazzle, but it generally gets the job done.

Sharpness and Performance:

I would classify the Derby Premium as moderately sharp. It has enough cutting ability to handle daily growth, not Feather but ok.

Comfort and Feel:

Where this blade loses points for me is in the comfort department. I found that it can be a bit uncomfortable at times, particularly when paired with more aggressive or efficient razor heads. Testing it in the Razorock Lupo and the Tatara Muramasa, I occasionally encountered tugging or a noticeable, rougher sensation that made the shave less enjoyable than I prefer. This could be due to the blade's edge geometry not pairing well with the specific blade exposure and gap of those razors.