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From the perspective...
January 29, 2011
Verified Purchase
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.
7 people found this helpful
A marvelous everyday...
September 1, 2011
Verified Purchase
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.
5 people found this helpful
i bought this pen expecting...
March 28, 2014
Verified Purchase
i bought this pen expecting to be able to ink drawings for watercolor since it said it was waterproof, but this pen smears SO easily i'm incredibly disappointed.

also, as others have said, the ink flows out of the pen very smoothly, but the actual design of the pen makes it a bit uncomfortable to write with. it may just be that it's a bit wider than im used to
3 people found this helpful
The best everyday pen...
June 11, 2011
Verified Purchase
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.
3 people found this helpful
Perfect for annotating...
October 9, 2015
Perfect for annotating charts.
I need to make notes on sheet music, and the Signo UM-151 has a nice fine line and a variety of colors.
The 0.38 is a little thin for reading at a distance. The 0.50 mm is the best balance between a fine line and legibility
Hank Sinatra
Precise, smooth flowing...
September 18, 2015
Verified Purchase
Precise, smooth flowing ink.
I've used about 10 pens...
September 9, 2015
Verified Purchase
I've used about 10 pens in four years. Ink writes great, smooth rolling and good weight and grip.

Only gripe about it is that about 4 of those pens dried up when I had about a fourth of ink left, and no matter what I did it did not alleviate the symptom. Could be because they were in the 10 pack box that I got, but I find it hard to believe that this dried up whereas my Zebra Sarasa never has even if it's in storage for 6+ months.
I'm enjoying this very...
September 7, 2015
Verified Purchase
I'm enjoying this very reliable pen, but find the ink a bit wet for some of the things I want to do with it (like faux calligraphy). Still, it's a good pen for everyday writing and the price is right.
Classic. Excellent...
August 28, 2015
Verified Purchase
Classic. Excellent
The best pens I've ever...
August 14, 2015
Verified Purchase
The best pens I've ever used. For years, I've been trying to find the right pen for me with equal parts good balance, writing feel and ink flow. I never would have thought a gel pen would deliver that for me but the Uni-ball Signo line is fantastic. I now have dozens of these pens strewn throughout the house and carry one with me at all times. It's a pleasure to write with.
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