I’ve had the top come off of 4 pens and the ink cartridge fly out and lost the spring while writing. The threads that hold the retractable top on do not secure the top if you are a heavy writer havining to writing forms in triplicate.
My husband & I both prefer these pens to the many others we have. The ink flows easily the color of the case is a conservative gray and they have click retraction. A winning combination for us.