Uni-BallAir Porous Point Pens, Micro Point (0.5mm), Assorted, 12 Count

This pen has kind of a fountain pen feel to it, which may take getting used to for some. The ink is indeed vibrant, and takes a moment to dry so one needs to be careful about smudging. Once dry, it's fairly waterproof; lines remain strong and dark, though there is slight smudging. Ink does indeed flow well no matter the angle of the pen. There is slight bleed-through to the other side of the paper, not more than for a typical felt-tip. Overall a nice instrument.

This pen doesn't write as well as I had hoped. It has inconsistent ink output so you will often have the pen stop writing. Honestly just not worth it. I recommend the Zebra Sarasa which is the same price pretty much and writes much smoother. Or the Retro 1951 which is higher end ~20$ but writes much smoother.

Writes very smooth

I don't know if I just got a bad one or what but this thing is just bad. Ink drops out, Ink is too wet. Every once in a while I will find an angle that works well, but it's far from their motto of "any angle"

Only a few pens have worked... I’ve already thrown away about four because the ink wasn’t coming out after writing for a few mins.

The ink is very spotty and streaky, smears when I used a mildliner with it. Won't be getting this again.