Pretty good - Umarex Red Dot Sights 2300577

This is the second cheap red dot I own. The first was a tru glo. Had to go cheap as I was purchasing a Nightforce at the same time. I like that I can adjust the red dot with clicks and a screw driver rather than an allen wrench. Only issues are the blue-ish color of the lens (would've preferred clear), and also had to move it pretty far forward on the rifle to allow for iron sites to still function. Would not have been able to do so on a rifle that only had a rail above the receiver and not on the barrel also.
Pros: real easy setup
Cons: color tint of lens

This review was written in the old system and had content requirements that are different than reviews written today.