No problems with it, sighted at 100, hit 200, hit 300, targets were 12x12 steel plate so for hunting it works really well.
When using it remember that the scope zoom level changes the yardage for each point of aim.
I"ve been using BDC scopes for 8-9 years now, the advent of Spot On has vertainly made a huge difference in my accuracy and willingness to pull the trigger past 300 yards. I've now plinked steel at 600 yards using Spot On but longest deer harvest was 427 yards. Gotta love it wen everything comes together!
Enter your Scope, Cal and bullet info and away you go!