I think it might be good, if I could disagree with this review of the Rotring Core, but I cannot. I own one of these monsters, but I have never written with it. Nor do I ever intend to write with it. I also own a mechanical pencil of this model which was inflicted on the world after Sanford took over Rotring. I read somewhere the sarcastic but apt comment that they were probably designed by someone who was employed by a athletic shoe manufacturer before. If I were to use the pen (or pencil), I'd probably also "hold this one in a small brown paper bag. It’s either that or go blind with the horror of the thing."