I love that this pack has 12 colors to choose from. I use these for the Pilot
Parallel Calligraphy Pen and it's fun being able to switch the colors around
during use since they mix well. Overall, this pack has a great variety of colors
for a reasonable price.
Ink colors are vivid and dry fast enough where you don't smear it with your hand
on multiple fast passes. I also have not had to clean my pen of stale ink so pen
clogging does not seem to an issue. It is tough to distinguish which color is
which since no markings designate color on the refills themselves.