I'm sold on the clicker sold by CSUSA or Lau Lau Woods. Lau Lau Woods has it in Rhodium, gold & Blk TI. CSUSA has chrome, gold, & Blk TI. The Blk TI & gold versions are a little cheaper from Lau Lau. I've probably made about 10 of these, and so far, I haven't had a problem. I've made 2 vertex click pens, and both of them worked fine. But I don't think the finish is as good on the vertex. I use a clicker almost everyday. But it doesn't get carried. So I'd say light use for my personal clicker. If it does get dropped, it's on carpet, so not much rough treatment.
I've also made several sierra click pens, and 1 elegant sierra click. I didn't like the elegant sierra, but the regular version worked fine. I made it in 3 different lengths, and all 3 versions worked fine.