I've one of those, and I love it. But usually I end using a Staedtler pigment liner, I prefer the blackness and permanence of ink, I prefer to strike and error (and remember it) than erasing and rewriting.
Yeah I prefer ink as well. Is the Staedtler pigment liner smooth on paper, though? I'm looking for a thin (0.3) but super smooth pen.
I use the 0.2(!) and yes, it is very smooth. I recommend it!
Steven mentions Rotring in the article; does anyone have any other suggestions of mechanical pencils?