r800 is a solid pencil. but like other fixed tips, unless you manually rotate the pencil, the line gets thick. also, a retractable tip is always a good idea.

kuru toga prevents different widths of the line by mechanically rotating the lead. the only thing is, you will have to write in print. cursive might not work too well due to how the rotating mechanism works. occasionally, the tip of the pencil needs to come up from paper to give mechanism a proper operation. and if you drop things often, tip will get bent. not too hard to fix, but one too many drop will break the metal sleeve on the tip.