Uni-ball Signo (DX) UM-151 Gel Ink Pen - 0.38 mm - Black

A marvelous everyday pen. This pen is my favorite. I have been ordering other pens to try them out and I always end up coming back to this one. I have gone through 11 of these pens so far and plan to continue using them. Some may find the line too thin, but I like it. The rubber grip seems to wear out and get a bit loose over longer periods of time (after replacing the inkwell once or twice). The cap also becomes a touch loose over a similar time period. I always put two or three of these on any Jetpens order I make. At the risk of making these pens be out of stock more frequently, I would recommend this pen to anyone looking for a hardworking, high quality, everyday pen.

The best everyday pen sold by JetPens. Can be used for writing and for drawing. Waterproof. Mitsubishi (Uni Ball) makes fantastic products. My favorite brand.

From the perspective of a university student, this pen is excellent. From working out mechanisms in organic chemistry to just simply writing (notes or essays), this pen does an outstanding job.

Compared to the Uni-ball Signo RT UM-138 (0.38), this pen is better built, has a slightly more comfortable grip, has a much larger volume of ink, and writes with the same "thinness" (but with a darker black). The RT's black ink always have looked faded to me and they all definitely run out of ink way too rapidly or even a mediocre writer/drawer/whatever.

The RT has the "clicker" ability (which I originally wanted this pen to be and would buy another one if it were a "clicker") but the cap removal process isn't a big deal. I've actually started to like the look of the cap and the way it snaps on makes it feel like it's a high class pen.

Overall, this pen is one of the best that I've used.

This is my absolute favorite pen. I picked up a bunch without much consideration when I lived in Japan a few years ago. After a few months, I realized just how amazing they were. It was the first time I had ever said to myself, "wow, what a great pen." Then after moving back to the states I realized they were impossible to find outside of Japan. Not even art supply stores had them. I finally found them on Jetpens-what a godsend!

They're the best!

I will admit, I have been a Pilot fangirl for a very long time. It wasn't until I became bored with my typical Pilots that I decided to venture out. And boy am I glad I did! I will admit without reserve that I am very quickly becoming a complete fan of the Signo line. I've never been a big fan of needle points and was slightly disappointed that the smallest non-needle point offered by Pilot was a 0.38. After branching out to other manufacturers, though, I'm finding plenty of alternatives. Now if only I could make a UM-151 fit my Pilot Cavalier...