I have the HHA XL-5000 and would recommend it to anyone. It is very bright in low light conditions, very easy to adjust, very sturdy, among other benefits. Once you have the marks you can slide the sight to the necessary yardage and shoot it without tightening it back down and worrying about noise. The only negative thing I can think of is if you 3D shoot the sight sometimes forms a halo effect in very sunny situations but you can still make out the target.