I don’t know much about this pen. Other than the eraser, it has a combo of attributes that make it an ideal pen for me. Weighty brass, hexagonal, wide grip, and Pilot-style G2 refills. The twist activation isn’t my first pick but it feels good. It’s a combo that is only available in a few other pens that are harder to get. I wish the joint at the nose cone was either more uniform or eliminated by refilling from the back.