I did not give this scope a full 5 for overall because of the illumination adjustment. You have to remove the battery cover, then the batter itself, to set the brightness. Then put it all back together and see if its right. There is not brightness adjustment on the fly, which I feel is a mistake for a "tactical" scope.
I knew this before I got it, so it's no loss to me. Over all this thing is bomb proof and I love the zero stops.
Pros: durable, zero stop
Cons: illumination brightness adjustment
This review was written in the old system and had content requirements that are different than reviews written today.