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Yes, it's a specialized...
August 29, 2011
Verified Purchase
Yes, it's a specialized pen, and I don't think it would be comfortable for extensive writing sessions. (I'd suggest the Hi-Tec-C .25mm for that.) But I needed something this fine for annotations and small details in my sketchbooks. This pen has performed beautifully for three years now, on a variety of papers. A big plus for me is that the ink is absolutely waterproof, unlike the Hi-Tec-C's. So I can go over my drawings with watercolors without any fear of the color running.
5 people found this helpful
I bought this pen because...
March 13, 2012
Verified Purchase
I bought this pen because I happen to write small. (Less than 1mm text height to put this into perspective.) It definitely does its job very well as a small writing pen. I use this for all my classes, from writing notes between lines and writing entire essays on 6 lines of wide ruled paper.

- The thin tip enables you to write thinner, smaller, and also in between lines.
- It also has excellent ink flow so you can write pretty fast with a pen this thin.

- It runs out of ink rather quickly. Buy lots of refills if you want this pen to last. In my opinion, it's a price I'm more than willing to pay to write this small.
- If the pen is dropped tip first, it may start to bleed out ink. Not only will that make your line thicker than 0.18mm, it will waste ink as you write.

As a side note, if you lend these pens out to other people, tell them not to write on their hands if they are heavy handed. (They’ll cut themselves.) Also, some students (AP students in particular) may want to buy these pens from you. Either redirect them to this website or buy some extra to give away or sell.
4 people found this helpful
Nice pen to own. .18mm...
April 16, 2011
Verified Purchase
Nice pen to own. .18mm size requires a slower hand to lay down proper ink flow but with patience is well worth the payoff. Unique +
3 people found this helpful
What a pen, my friends,...
September 7, 2012
Verified Purchase
What a pen, my friends, what a pen.... Think on this for a moment, the tip on this pen is, quite possibly, the smallest all metal nib made. You can ink very small, very thin lines with this, in fact, if you go too fast, you leave nothing but an indent in the paper. What makes this pen shine for me is the fact that you can use speed and pressure variations and whatnot to create even smaller and thinner lines than you ever could make with a felt tipped copic that is .05mm. It takes a fast yet gentle and painstakingly careful hand to work with that tiny copic. This uni ball signo bit is a beautiful thing because it costs less, much less, is very sturdy compared to the copic felt tip, and is relatively easily replaced.

Now, that said, the ink goes quick, like a reviewer said, because uni ball is cutting costs and putting less in. I just got it out of the package, and it was half empty. Not only do they put less in, but the space which contains the ink is ludicrously thin as well. The pocket clip has not broken yet, but I put zero trust in it due to the ominous rattlings coming from it. Refills are, actually, quite expensive, just a little less than the full pen itself.

In conclusion, I would only get this for annotation or drawing, and I would, and will, get it again.
1 person found this helpful
For the last few years...
August 31, 2012
Verified Purchase
For the last few years these have been among my favorite pens and by far are the best of the micro-fine points on the market today. My review of the Uni-ball Signo Bit .18 can be be found at the link below:

1 person found this helpful
I really miss this pen...
May 5, 2016
Verified Purchase
I really miss this pen - took time to get used to it and then I loved it - the only super-fine of its kind. I was quick to judge… [regrets]
Thinnest pen in the herd....
January 20, 2016
Verified Purchase
Thinnest pen in the herd. I don't actually this as often as I'd like as it's very, very thin, but for the few instances that I have it's served its purpose.
I use it primarily for making exclusive notes on onion leaves (Bible paper), and it's very good for thin margins. Just don't expect to use this for long periods of time; it's a very thin pen, so it's extremely skippy and scratchy.

Otherwise, get it for the novelty!
As fine a point as I...
November 19, 2015
Verified Purchase
As fine a point as I can get. I don't believe the pens are available anymore.
I bought refills
Wonderfully strong with...
February 10, 2015
Verified Purchase
Wonderfully strong with good amount of ink at an unbelievably fine point. This is the thinnest point I’ve used so far on a pen and probably will be since I tend to be a very heavy writer and am afraid of breaking just this point.
Wow - just Wow. Keep...
May 7, 2013
Verified Purchase
Wow - just Wow. Keep in mind that the "0.18" refers to eighteen one-hundredths of a millimeter, and there are about 25.4 millimeters to an inch, and you quickly come to the realization that calling this a "fine point pen" is an understatement of considerable magnitude. The engineering required to make a pen like this is noteworthy, but Uni-ball makes it even better by making a pen that writes clean, unbroken lines of extraordinary thinness. I actually had to look carefully to be sure ink was being deposited on paper. Want to transcribe a textbook onto a Rhodia Bloc No. 10 notepad? Most of a concerto onto one sheet of musical staff paper? Get a couple of these, and some refills, and you'll be ready to go.
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