Horrible!! All 10 refills I purchased were dry even though I purchased them over
a 6 month period through three separate transactions.. I would not recommend it.
You can use the Zebra refills for the Dr. Grip multi pens, which are what I've
switched to! (same price)
I use this refill in my Pilot Down Force pens for work and they are great
documentation requiring ballpoint pens
I have never had an issue with consistency. I have used multiple refills of it
too. Been using them for over a year now. Just buying some more today!