I've built just about every "clicky pen" made (never for sale, BTW). All have failed at some point, with the exception of the Elegent Beauty. And that may very well be because it's new...but a man can dream!
People who really want "clicky" pens (my customers for these are Dr's, Nurses, EMTs, PAs, firefighters, utility workers and other "one handed" workers), These people really put them through the paces. So far, I found NOTHING that remotely rivals the free "drug" pens that pharmacutical reps give away. The longest lasting model was the "long click" but if failed long before (actually nearly a year before) the "free" pen.
I've got several of the " Big Pharma" pens dissected to see what makes those pens work so flawlessly and how to replicate that action.
If you sell pens, there is no plausable reason to make a $50 or $75 pens that never works as well as the giveways.
THERE IS a big, wanting market for high end "clicky" pens. So far, just not real product offerings. It may be time to regress to the ways of when I first started "retrofitting" Zebras, Pentels, et. al with "snazzy" bodies".
AND by the way, THOSE people usually write through 3-part NCR paper which eliminates gels, roller balls and most things, EXCEPT REALLY GOOD BP PENS.