I’m no connoisseur when it comes to glittery gel ink pens—I may snag one as a novelty, but I don’t have my finger on the pulse of that movement like I did in the 6th grade. My knowledge of the quality of entrants in the field is lacking. That said, I do have a rather cat-chewed Sakura Gelly Roll gel pen in sparkle purple that I will use for comparison.
The body is nice, as far as these cheap things go. Sparkles in the body and cap—noticeable but not gaudy. Cap posts securely on both ends. Pen itself is theoretically easy to refill (who knows how easy refills will be to find, however).
First, how the ink writes. I find it smoother than the Sakura Gelly Roll, and generally more consistent. If I’m gonna be taking some sparkly notes, on writing quality alone I favor the Uni Signo over the Gelly Roll.
As far as personal preference goes, be advised that the Signo ink is more translucent and the Gelly Roll more opaque.
There is a big flaw in the Signo that you have to be warned of, one that does not plague the Gelly Roll: the Uni Signo glitter ink smells like fish. Smells *powerfully* like fish. If you write with it long enough (read: at all), you’ll think you’ve been transported to an open air fish market. It is truly bizarre.
If you like fish, get this pen. If you want glittery and smooth writing, get this pen. If the mere thought of seafood turns your stomach, DO NOT get this pen.