Uni-ball Signo UM-151 Gel Ink Pen - 0.5 mm - Mandarin Orange

The Signo UM-151 has quickly become my everyday, go-to pen. The ink flows incredibly smooth, there is no scratchiness, and the ink dries quickly with no bleed on every paper I have used so far. I chose the 0.5mm simply because I had some experience with a store-bought Signo in the 0.38mm size, and I found it a little scratchy for my taste. Obviously, this is a personal choice. I know that many of the reviewers here love the ultra-fineness of the 0.38mm.

I will tell you that the 0.5mm in this pen is unlike any 0.5mm I have used that was purchased from a store in the US. This pen produces a finer line without the scratchiness I usually associate with a fine, metal point. The grip is very comfortable, and this pen has been a joy to write with, even when taking copious notes as I do with my job.

When it comes to color, I have to admit, I love this orange. Is it the most professional color, no. However, I'm not handing my notes into my boss to be graded. I use this color in combination with two others to color code my notes. Also use this to underline and highlight material. Fantastic, bright, yet deep, orange color.

I will definitely be ordering more of these, as I anticipate using them often.

I think I'm in love with this pen. I'm a huge fan of the .25mm Slicci, and this pen--this color in particular--gives it a run for its money. Ink flow is smooth, pen is well-balanced, and the color is phenomenal. You know how a lot of purple pens end up looking kind of fuchsia-ish? This pen, on the other hand, is a true, deep, royal purple. I adore it. I also got the Black, Bordeaux Black, and Brown Black, and I love them all for the same reasons (although the lavender black is my favorite color). There is a noticeable difference between this .38mm line and the Slicci's .25mm line, so I won't be using this one for extreme detail work, but there's nothing wrong with having different instruments for different purposes. Excellent pen!

I love this pen. It writes smoothly, and the ink is a deep, pine green that looks great no matter where I've used the pen. The color is subtle (it doesn't scream "I'm GREEN!") but still looks unique.

I find the 0.38 mm version to be a sweet spot of fine, concise lines and ease of writing. The blue black ink is a fantastic alternative to the usual black but still professional in appearance to be used in a business setting.

This is a very bright pink! Almost like a hot pink. I like the 0.28 Uni pens. I think these are quickly becoming one of my favorites.