So far I am impressed with this optic. Nice clear picture. Seems to hold zero well. Rugged. The circle etching in the glass allows you to shoot with or without the green or red illumination. The benefit of that of course is that if for some reason the optic malfunctions or the batteries die you can still use the scope to precisely shoot. I do wish they would make a 2x or something like a 1x3 power.