I have, or have had, or have shot behind almost all of the top tier glass.
I love my Kahles K624i Gen 3. It is my go-to scope for load development. It has been on probably 30 different rifles, over thousands of rounds. Always returns exactly to zero on the rifle it lives on.
Is it as good as a S&B, Premier, or Tangent Theta? Not quite, maybe 95%. But is it as good as a NF or USO? Yep. Is it better than almost all other scopes? In my opinion, yes. I would not hesitate to buy another one. And I have two S&B, two Premier, two TT, and a March to compliment the stable and compare. I have stepped up from other scopes, like SWFA HD, Steiner T5Xi (mine was not so good at all), Vortex Razor Gen I, Vortex Razor Gen II, Vortex AMG, Zeiss, Leupold, etc.