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This pen is my all around...
November 6, 2013
Verified Purchase
This pen is my all around favorite for industrial design sketching. Makes clean, fine, sharp long fast lines on cheap multipurpose printer paper. Consistent. Pretty resistant to blobbing. Black is really black. Decently comfortable grip. Good balance. Cap is secure when on either end.

Love the whole UM-151 line - 0.28mm, 0.38mm, and 0.50mm. The blue-black, brown-black, and green-black are also great.
Awesome. Just got this...
November 5, 2013
Verified Purchase
Awesome. Just got this from JetPens a couple of days ago and have been using it at work since then. I'm a mechanical engineer and I use this for my notes, marking/labeling, and some sketching (industrial design style sketching - not drafting). Pen is light weight (this could be good or bad, depending on your preference); pretty well balanced posted or not; and it has an average diameter and nicely tapered rubber grip. I usually print but it is okay for cursive also. Black ink is definitely black, not washed out dark grey. Line weight is about equal to a 0.50mm Uniball Signo or a Pilot Precise V5.

Three days in and this pen is definitely looking like a 'go to' for my day to day work. So far it does it all for me: resistant to water, highlighters, Copic and Prismacolor markers. Wrote on the corner of my safety glasses lens and wouldn't wipe off with my finger after it was dry (~10 min?). Apparently it will write on anything - once you get it started.

Not the best for sketching (gets a bit globby on long fast strokes) - for that I mostly use either a Uniball Jetstream or a Uniball Signo 0.28mm.
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