I felt like the eye box was overly critical and the parallax adjustments were fickle. I'm no optics analyst but it was less comfortable to look through than a 4-16 atacr which uses the same exact glass. Since the drop tests started I've bought and used swfa 6x,3-9,3-15,5-20,1-4 Bushnell lrts 3-12,4.5-18, lrhs2 4.5-18 DMR3 3-21, night force nx8 4-32, atacr 4-16 atacr 5-25, trijicon credo 4-16, ten mile 3-18, maven RS 3.2 5-30. I noticed that the scopes that had lower magnification ranges were easier to get a good image and typically more comfortable to look through. The same seems to be true for longer scopes. This probably doesn't matter at a rifle range but when you're in a compromised shooting position trying to spot impacts it matters. Or if you're trying to track a moving animal through trees. That is the appeal of the fixed power Scopes. They just work well.