I have been practicing for some time Sketch Notes. For that I need pens that write fluently, dry quickly, in different weights are available and are waterproof, so they can be painted over with felt-tip pen if necessary. On the Micron I have been advised of various illustrators blogs, as a top recommendation of experienced draughtsmen. I have tried so far Staedler pigment liner, which are pretty good, but because the tip me is a bit too soft. Edding 1800 are very similar to Sakura but unfortunately prone to leakage and Faber Castell Pitt Artist Pens. The Sakura cut for me by the said companies from the best and are absolutely comparable in durability. In Set the price is absolutely ok