I bought these refills in blue, black, and red for my uniball jetstream
multi-pen. None of the colors perform as expected. I use this pen daily at work,
and have found that after only 25-50% of the cartridges have been used, the ink
loses its color intensity and begins skipping. I am replacing ink much more
frequently than should be necessary. I will continue to use until my stash of
refills is exhausted (since the money has already been spent), then will trash
the pen. Do not recommend, will not repurchase.
I wanted to write a positive review- I REALLY did. The jetstream is my favorite pen. I picked it up at a fancy stationary shop in
San Jose but moved away since and hadn't been able to find these pens in stores
anywhere. I discovered JetPens and found the refills and I couldn't have been
more excited. I bought a couple of the refills, since I use pens very frequently.
The first refill had problems skipping over parts of the words but if I kept
scribbling around, the ink would eventually start flowing. I'm on my second refill now and not even a quarter of the way through and it's
skipping out HUGE chunks. Scribbling doesn't help the ink flow, unfortunately.
I was really excited to see these refills on JetPens, but I'm ultimately
disappointed in my purchase. I would not buy these again.
I really like the 0.7mm ink better than the 0.5 because it seems to write
smoother and is more legible. I had a previous problem with the refills being
too long for my Uniball Jetstream but these fit perfectly.