Mitsubishi Pencil UMNSP38.13 Gel Ballpoint Pen Uni-Ball One P 0.38 Momo

This little pen caught me off guard. At first, I thought the small size would be an issue, but man, it’s actually super comfortable to hold. The thicker body gives it a nice, solid feel in the hand, making it way more ergonomic than expected.The writing experience is smooth as can be, with ink that flows effortlessly and dries almost instantly—no smudging, no mess. Perfect for quick notes or extended writing sessions. The real standout feature, though? That clip. It looks like a paperclip but functions like a high-end pen clip—solid, stylish, and it even lifts to fit onto thicker materials without feeling flimsy.If you want a compact, premium-feeling pen that punches way above its weight, this one’s an easy must-have.

Pilot G2 Mini replacement. Pilot G2 Mini have been my EDC pen for over 10 years. I will now carry one of these instead. I will likely be buying a few more.I think this is a more comfortable barrel for my hand. It also has a more durable clip.I'm a lefty writer. I also love that this barrel fits Jetstream refills fit without modification. Not sure I will do so as the One ink flow is very nice and seems to dry fast enough. I'm not having much issue with smearing. Ink dries much faster than the Pilot G2 ink.Ink flow with the One ink is great. Writing is very smooth.My only complaint is that this pen isn't available in a black barrel. A black barrel preloaded with Jetstream ink would make this pen perfect.

I bought this pen because I heard it was pretty decent based off a list. I now can no longer write without thinking how I could be writing with this pen instead.I was very skeptical of the grip when I first purchased it. I have tendonosis, so most writing utensils require a large amount of energy from my hand. This pen fit immediately and works so well with the natural motions of my hand.If you are looking for a quiet pen, this isn’t it but for me– that is the charm. The response of the spring and the scratching of the pen head reminds me of the humanity of writing. The color intensity and short drying time (it’s not a perfect no smudge) honestly is so sharp and worth the value.I buy these pens in bulk just in case they never make them again. would recommend in the coffee color for the whimsical.

I love this pen! It writes so beautifully and the color pink is soooo cute! Although it is actually smaller than it looks but I love its chunkiness is it’s fine 😊I definitely recommend!

These pens are awesome. I have the green and the purple ones. They write smoothly and they dry quickly so they are smear resistant. Despite being small pens they are the perfect thickness to still be able to grip the pen well. They lasted a long time before I needed to buy refills, so definitely worth the amount you pay for them!

Love this pen. Writes smoothly and fits in the loop of my small notebook. Like how fine the pen is.

Writing is cute if you are looking for a smaller point pen. However, the ink does not write smooth all the way, it cuts off at points. The pen itself is too small even for regular hands. I would assume this is for quick notes as it is quite small and can probably get tiresome to use unless you have tiny hands.

TL;DWR. The pen writes fantastically and has great ink, the body is above average in build quality and ergonomically very comfortable. However the spring isn't changeable and for me was squeaky right off the bat.The Uni-Ball One P is an interesting little pen with it's stocky design. The overall build quality is quite nice and It's no heavier or lighter than most pens; I found it quite comfortable to hold even with larger hands.The plastic body itself feels fairly premium?Definitely not cheap feeling but also not completely outstanding, with the walls of the pen being just a tad too thin for it's extra circumference, leading the barrel to have some "hollowness" to it. Which overall makes it feel less dense than you think it would. However the thicker body means it doesn't need any sort of grip or rubber to hold very comfortably.The click of the pen feels disappointingly soft and the spring is quite squeaky (more on the spring later) but the actual writing experience is very nice and the ink is incredible, outperforming my previous favorite ink from Energel. It's incredibly dark, very smooth flow and very very quick to dry (like seriously the only way I could get it to smear was inking a circle in completely and then very quickly running my finger across).The pen clip being made of metal and separate from the pen body is also very nice, it means you don't have to worry about a plastic piece that can break off as the metal would bend before it would break.Now about that spring... Well it's hidden, and not removable from what I can tell, and the same goes for the push button/thrust device. Which comes with both a pro and a con, the pro being you can't lose anything when opening the pen to change ink. The con being you can't replace the spring, period. Which I could actually see being a great thing if you're giving this to a kid who likes taking stuff apart. But if you're like me and want to be able to change the spring it's pretty unfortunate. Especially since it doesn't sound all that great out of the box, though it might be smoothed out with a little mechanical keyboard lube.Again, overall a great little pen. Very aesthetic appearance wise and also comfortable to hold. With the ink being the true hidden gem of this pen. (But I gotta dock a star for the squeaky spring)