I have the 3-15 and 4.5-22. The illumination quit working almost immediately on the 3-15. I haven’t noticed any zero issues but also haven’t used either one enough to be sure
I’ve owned a cpl. One was never dialed and did fine. The second wouldn’t track at all.
Way too many referenced warranty claims and potential issues for me to ever own another.
When you can buy a Trijicon Credo with basically the same specs for considerably less, it’s a no brainer