I purchased 5 Fisher bullets and returned all 5 for having defective cartridges. They were repaired/replaced by Fisher and returned to me without the ink leaking around the seal (butt-end of the refill). However, now all of them have again begun to leak around the seal, resulting in little pressure at the tip so it does not write very well.
I dunno...0 out of 10 doesn't seem like very good odds for me. I could send them back again, and perhaps have them repaired/replaced again...but now that I'm in Taiwan, that would not be very convenient.