Things I liked:Excellant quality and customer service. Things I would have changed:I would make the ring bottoms out of steel. The aluminum is very soft and if you are not careful, you'll strip the windage adjustment screws out. What others should know:Adjust the windage on these rings very carefully. Like rolling a twig between your fingers. After stripping mine, I called Bsquare and they sent me out a new set. I can't say enough good about their service. Good design but could be better if made from all steel.