Yesterday I looked thru my buddy's Arken EP5 and his 5-25 Strike Eagle with him. At 25x the Arken was clearer and crisper than the Vortex. It seemed the eye box was a little tighter on the Vortex making the Arken just a tad and I mean very little for acquiring your target. I did not touch the knobs and we didn't discuss them so I would tend to believe he is satisfied, especially for a $550.00 scope. He did more than this and it cut the mustard for him and I'm confident I'll be happy with mine. If an issue arises, like most other scope companies I'm sure Arken will handle it in a timely and swift manner.