I had a hs-t start stripping teeth out of the elevation turret. It would click but some clicks didn't adjust. Eventually it would get "lost" somewhere between 18 Moa and 24 Moa. I would have to re-zero and keep dopes less than 18 Moa. Had it repaired and haven't had a problem since. It was relegated to my .22 though.
This was after 4 years of pretty heavy use. Monthly competitions, sometime multiple, with practice every weekend. For the $400 I paid for it there is no questioning the value.
I own 15 Vortex product's. I had to use their warranty once when I cross threaded a sunshade. I hardly think that's their fault, but I'm glad them helped me out.