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.