I have the .35 mm Rotring...
I have the .35 mm Rotring 600 in black and silver. One thing to note is that the
finish on the silver Rotring is much smoother. Also, the my black knurled grip
tends to get noticeably dirtier than the silver grip, although this is a minor
nuance. The pencil itself is very solid with little play. I've even taken a lit
match to the body of both Rotrings (don't ask).
It is by far the heaviest writing utensil I own, and I wish the grip was a bit
thicker. I find my hand cramping a bit after extended use.....like the Platinum
Pro-Use II which I just ordered. Otherwise, this pencil is very cool yet
professional looking, and should be great for drafting. Personally, I've used it
for detailed Japanese and math work. I don't even bother with the tiny eraser,
as the Mitsubishi boxy eraser does an amazing job.
Overall, this pencil is clean and modern with some serious craftmanship...I'm
hoping to compare it to the Steadtler 925 and Platinum Pro-Use II very soon.
In other words, you should probably get it.