I would highly recommend that if you are considering purchasing ballpoint pen
refills for your Sharbo X, you should stop for a moment and consider what you'll
be using it for.
If you need something that dries quick on any surface, then this may be your
best option. However, in my opinion, the quality of line and smoothness of
writing is on par with a run-of-the-mill bic pen. I stocked up on 3 pens worth
of ballpoint refills and was shocked at how average they write.
If you want to lay down richer, more saturated lines, with smoother strokes, go
with the gel refills. I have tried the 0.7s and and they are wonderful.
When I first ordered this refill, i was excited about the great colour. I
expected it to be as vibrant as a gen ink refill but I was sadly mistaken. The
color seems very weak on the page, almost illegible. Also, it doesn't write as
smooth as the gel refills.