It is a relatively good ink, one of the best blue colors. It has a huge duration, 57 ml of ink lasts much longer than expected, even with a lot of writing, as a standard converter has a capacity of 10-15 drops. It writes very well on regular A4 printer paper, so it won't have any issues with anything better than that. It dries very quickly. It might be the best ink in terms of drying time. 4 stars because it could be a little more liquid, but this does not affect its use on regular paper.