I use a Rotring 600 3-in-1 and it's excellent. Although I prefer the way Uni Kuru writes as it rotates the lead as you write making everything very even. Having

I use a Rotring 600 3-in-1 and it's excellent. Although I prefer the way Uni Kuru writes as it rotates the lead as you write making everything very even. Having a very good pencil + two coloured pens in your hand is just awesome.