I want to inform the friends who bought it and found it useless that I was also ready to throw it away and give it 1 star, but then I realized that it intentionally has a wax-like material in front, so that the ink doesn't run while it sits unsold in its packaging. I removed it with a bit of scraping and everything is fine! You guys threw it away for nothing, the ink is great!! My favorite color is black, but the blue is also very good. It dries almost immediately and this is very convenient for me, being left-handed. For those who thought it doesn't write well, they should double-check the quality of the paper they are using. On plain cheap notebooks, it sometimes skips for me too, but on quality pads like the Rhodia ones I bought, there is no problem at all. Cheap paper doesn't go well with rollerball inks.

Medium quality ink. Yes, it dries incredibly fast and it's difficult for someone to smudge it, however, its duration is incredibly mediocre and the writing quality has many inconsistencies.

For my taste, intense writing that is also evident on the back of the page. It concerns the black color.