The two I have are a 4x14 on a 257 Roberts, and 6x20 on a 308, and like them.
They do "go-dark" in evening hunting about 10 mins before the Nikon or Burris Signature, but at lower power settings, there is no notable difference. I like their image and color transmission quality.
Not in love with the look of the rubberized power ring and parralax setting adjustments, but they do work well. I do not own any scope that holds zero, or tracks any better than the Weaver GS's.