Writes really thin and it's nice quality.
Very good pencil. All chrome parts are metal. Build quality is quite good. The lead in its tube does not wobble or tend to snap when writing. Click mechanism feels nice. Comparing 0.3 to 0.5 -- they do not differ very much. The shape of the lead tip may make 0.3 lead produce thicker line than freshly rotated chisel-point 0.5 lead. But on average there will be a small step towards thinner lines, which I like.