Be aware the ink is a lighter blue/more watered down by the catridge manufacturer than one would like, feathers a lot. But other than that, it's affordable blue ink. If you write with it on fountain pen friendly paper, it's decent. On general office paper, this ink is too watery and too feathery in an ugly way. If you need to write on office paper, maybe choose the black ink from the same seller - it's a bit better in that sense than the blue.
Good inks. Well packed. I’m satisfied.