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The pen has a VERY fine...
March 21, 2013
Verified Purchase
The pen has a VERY fine tip which I prefer. It lays down a very thin line (hair thin), but it is dark and doesn't skip. Some rattling in the clip when writing, but I do not find it distracting. The design is sleek and it works very well.
3 people found this helpful
This is a great pen....
January 24, 2015
Verified Purchase
This is a great pen. I love the look of the pen and the grip that extends to the very bottom of the pen (I tend to hold pens close to the tip). The ink flows easily and doesn't smear or smudge. The only bad thing about this pen is that the clicker rattles when pushed in. However, this isn't really noticeable unless you're shaking the pencil around a lot -- I don't notice this when writing.
2 people found this helpful
This pen has now become...
April 20, 2014
Verified Purchase
This pen has now become my favorite pen. It is a thin line, but still managed to be a nice dark black, while drying fast, which I need because I am left handed. I have bought four more of these pens because of my experience with this pen.
2 people found this helpful
The Uni-ball Signo RT1...
February 15, 2014
Verified Purchase
The Uni-ball Signo RT1 UMN-155 is as innocuous as a pen can get. Once you pick it up and start writing with it, you will not want another black 0.38 pen. Consistently smooth, jet color, never skips,... amazing. Big tip of the hat to the folks at Uni-ball. They did it again.
1 person found this helpful
I bought this and a Ohto...
January 13, 2014
Verified Purchase
I bought this and a Ohto Slimline retractable in the same order. One reviewer said they used to love the Signo, but now the slimline is their fave. Not the case with me. The 0.38 Signo is very smooth and balanced, while the slimline is far too slim a body (and I have pretty small hands!) The slimline is quite scratchy too which I find irritating, but otherwise writes fine. It's just not my first choice. The Uni-ball Signo is now my very first choice. A great pen all around.
1 person found this helpful
These pens are the smoothest...
March 5, 2015
Verified Purchase
These pens are the smoothest writing of the micro gel pens that I've tried. They make using a small Doane Utility notebook as a bullet journal possiblem since with these you can write in each block of the grid.
Love this pen! I ordered...
March 4, 2015
Verified Purchase
Love this pen! I ordered this and the refills for my husband who now loves this pen.
LOVE this pen. Again,...
March 2, 2015
Verified Purchase
LOVE this pen. Again, very smooth get ink.
Usually I am concerned...
February 11, 2015
Verified Purchase
Usually I am concerned about pens smaller than 0.5mm, as they tend to have a "scratchy" feel to them. This one, however, exceeded my expectations and is not nearly as scratchy as others I've tried. I usually need to write TONS of notes in small spaces and this pen is PERFECT for that!
Great pen, while it lasted. I...
February 10, 2015
Verified Purchase
Great pen, while it lasted.

I ordered both a light blue and a black ink UMN-155 Gel Ink Pen with the 0.38 mm tip. They were both excellent pens. After working late one night on a project, I didn't retract the black pen's tip for the night. When I found it the next morning, the pen had dried out. I tried to fix it according to help from JetPens Customer Service (who were helpful, supportive, and gave great suggestions), but I wasn't successful. Remember to retract the pen tip.
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