Nice magnifier for the buck. Light transmission is not as good as the $500 real thing, but more than good enough. The included mount is pretty much worthless which is what I expected. Get the Burris high ring (30mm, 3/4")for the EOTech 512 which I bought this for. Get the Burris extra high ring (30mm, 1") for EOTech models with the raised base like the 516.
Pros: clear lenses, feels sturdy
Cons: included mount is poorly machined
This review was written in the old system and had content requirements that are different than reviews written today.