I made this pen mainly for lining and sketching. I mostly use it for doodles. :)
I think it could be used for coloring, but I haven't tried. I recommend just sketching or lining. The pen has a lot of variability, and it's easy to use. This pen is usable with both light and heavy pressure.
I tend to use a lot of pressure when I'm drawing, and I really love using this pen.