These pens are quite nice, and economically priced. I realized they are water
soluble, so you can use them to create washes for more subtle variations of
colour. They can be used with alcohol based markers, like Copic Markers without
smearing when I did a few tests. The brush tip is very sturdy, and does not fray
even after a lot of use. I would say these remind me of the Tombow brush
markers, so if you enjoy those, this colour brush pen would be a good choice.