I really like this gel pen. I love how black the ink is and how it sits on the surface of the paper, rather than soaking into it. I find .38 writes more smoothly and resembles the marks of .5 in other gel pens though. I've had some .5 Uniball One pens that had issues with skipping (granted, I picked those up at Office Depot, so maybe those are poorer quality than the imported ones from Tokyo Pen Shop? )
