When they work, they work great but ink flow can be iffy. Most of the time
tapping it straight down on a scratch pad several times gets it going again.
Also, have to give ink 2 or 3 seconds to dry before touching.
RED RED AND RED. This is a great pen for 0.5 mm. It doesn't smear if you give it
like 4 seconds or so. Smoothness wise I think it's not ubber (yes, I said ubber)
smooth and the flow of ink is good/okay, but not the best. The barrel is very
simple plastic barrel. This pen is a pen worth buying thought.(: