Customer Reviews

I'm relatively new to the world of micro pens. The other micro pens I have are the mach IIs which are liquid ink and 0.4, the mach III (not on jetpens) which is 0.38 liquid ink, and the stylefit 0.38 gel. I will say that I am impressed with this pen. It does not skip and is pretty smooth, not to mention it's cheaper than the stylefit and has a larger ink refill. The ink refill isn't as big as it looks because the plastic walls of the refill are thick, but I'm pretty sure there's more ink than in a stylefit single refill. If you want an all purpose thin pen, I'd say based off my first impressions of writing that this is the pen for you. I haven't had this for a long time, but I am optimistic that it will turn out to be a great everyday usage pen.

This pen has the best "bright" blue color !

It's ink is not too dark, not too soft. Sarasa blue is too dark & Signo Light Blue is too pale for my eyes. This Uni-ball Signo RT Blue has the most beautiful blue color. I'm only using Signo RT Blue Black & this Blue for everyday use, for journaling, note taking, and drawing. Signo RT is the best pen... : )

-R

These are my everyday, go-to pens. I ordered a box of them six months ago and have been using them in a primary role ever since. I use them primarily at work, where I'll take notes, sketch designs and diagrams, markup drawings, and make notes in small notebooks.

The gel ink flows smoothly and looks great in blue. This is the same as the rest of Uniball's Signo line, although it tends to smear less while drying due to the smaller line. I like the shape and texture of the grip and the minimalist style of the pen. It writes very well, and is extremely precise. Sometimes it can skip, but generally only when writing large and quickly. Since most of my writing is smaller and precise, this pen fits perfectly.

Jim

Smoothness: okay
Precision: okay
Weight: light
grip feeling: okay
cushion: solid

Overall: Okay. I personally prefer Pilot G-Knock Retractable Gel Ink Pen - 0.38 mm
for better grip and better nonslip feature of the cushion.

Feels great on paper. A little scratchy but perfect for jotting down very quick + short notes. I think it would make taking long notes really really slow so i would stick to the .5mm model which I love. either the UM-100 or the UM-151.

for a .3mm tip, it's scratchy but it's the least scratchy out of the other .3mm pens i've tried - including the hi tec c coleto. i would prefer this pen over the hi tec c. lines are nice, thin, clean and controlled.

Although this pen writes a bit scratchy, it writes out clean lines of uniform width and ink control.

While the 0.38mm tip writes fine lines, I am rather disappointed in the ink reservoir. If you pay close attention, the inner diameter on the refill is much smaller than most normal refillable pens which explains why these pens have such a short lifespan. The inner diameter on this refill is 2mm (approximately 3/32”) whereas other pens, like the Zebra Sarasa or the Uni-ball Signo 0.5mm, have a much wider inner diameter. These pens have a 5mm (approximately 5/32”) inner diameter, resulting in 2.5 times more ink than the Signo 0.38mm RT. It’s a great price, especially for those who love super fine tips. Me? I’ll take the extra ink with a 0.5mm tip.

Amazing, amazing, amazing. Perfect point, beautiful dark purple color, comfortable barrel. Thanks JetPens!!

I don't think there is a material difference between the ink output of the RT/DX lines. Other than the obvious ink capacity of each refill, I prefer the retractability, grip and design in general of the RT. Definitely one of my favourite gel pens - it writes a lot better on 'normal' paper than the Hi-Tec-C line, although I still prefer Hi-Tec-C 0.3mm tips if I have better quality notebooks to use.

I am obsessed with this pen! I bought a whole box of them (10)!!! The fine writing line is perfect for fitting a lot of information in a small space. Especially filling out forms. I used to be a business person and was very strict about using black ink. Whatever. I then switched to blue ink feeling it was more expressive. The blue/black ink gives a perfect balance of color.

To the guy who is complaining about the reservoir size. It isn't that the .38 size has a smaller reservoir in particular, it's that the retractable signo's as a model have a smaller reservoir. Any size of signo DX models will have the same size reservoir. If you want .38 and still want a big reservoir go look at the .38 signo DXs. They also come in .28 and .5 btw. Anyways, the pen itself has been good to me as all the models of signo I've tried have been. Other than that sometimes not having to worry about a cap can be a good thing. Also, the grip is farther down the pen, which is better for me because I hold pens closer to the tip, which with the Signo DX model is pretty far up so I end up holding past the grip anyways.

This is a decent pen. I like the look and feel of the Sarasas better, and I ended up preferring their 0.5mm tip to this one's 0.38 point... it's just too fine for me. Better suited for drawing than writing in my opinion.

Love this pen! The color is gorgeous, and it writes like a dream. Just ordered two more :)

The first time that I used a Uni-ball Signo RT, I was in love. I had gotten it in a random set of pens from one of my mother's co-workers who was moving to Japan. I have spent the last six years or so trying to find more of them!

Many pens will try to measure up, but I have yet to find a pen that matches combination of the smooth writing flow and the precision of the .38mm tip. I was so excited to find these pens available on JetPens! I immediately bought the 8-pack, plus two black singles, a lavender-black single, as well as a blue single. I couldn't be happier!

I LOVE this pen! It writes so smoothly and the ink is fantastic. Sometimes I just stare at what I've written because it looks so good!

I love the color of this pen--so much so that I didn't realize until I tested it against my Uni-ball Vision Elite Micro (0.5mm) purple pen that they were the exact same color of ink! So now I have two of the same color, just different widths. If you're looking for this color in a wider width, try the Vision Elite in micro or bold (0.8mm) in purple.

I love the light, ergonomic style of this pen and the fact that the soft grip extends further down the barrel. The barrel is just right, not too slender or too chunky. The best part of all is the fabulous ink color that is suitable for the office as well as more informal venues. The ink is waterproof, writes smoothly, is highly readable and easy on the eyes, and never skips. My only wish is for a greater ink supply.

This pen is simply awesome. The colour is beautiful and it's really smooth too. Writing with such a smooth fine point makes my normally terrible handwriting mildly legible. I'm definitely buying a multicolour set of these on my next order to replace my G-Tec-C set.

These are like the awesomest pens in the .38 category. The colors are very vibrant and they write smoothly. they are also great for sketching if you sketch with pens

These pens write the best for .38 mm. Now for some of the colors are a little off from it's barrel color. So don't buy these pens based on barrel color. The colors aren't neon-ish either. I like how each color has the same color barrel! No way you can get confused there xD

My favorite pen. Smooth consistent inkflow combined with a super dense ink formula all in a pen that's light and retractable (easy to use on the fly) makes this the first pen I grab for 99% of the time. The set is great and the extra colors really makes it a must for people who are OCD when it comes to organizing.

I've used this pen every day for over two years. I keep them in my office, in my handbag and at home. I write best with a slim bodied pen and love the blue-black ink.

Color is not as nice as the Zebra Sarasa 0.4 in light pink or Morning Glory Mach II. This pink tends to be going more toward a coral which was surprising to me since the body is so pink and a nice shade of pink at that. Oh well. I may give it away.

An outstanding pen. The grip, while not soft or gimmicky, doesn't slip. The red (reviewed here) is bright and easy to see against black or blue text; the ink is bright without being watery. The choice of 0.38mm nib size is outstanding for those who tend to prefer fine text. Notice how wide the ink store is inside the refill: coupled with the fine point, the ink in these pens lasts a long time. Some reviewers complain of scratchiness; I tend to press hard when I write but I find the tip of the UM-138 delivers firm, deliberate strokes without being too scratchy. The ink never skips. I will continue to purchase these as my standard, household gel ink pen.