I've got several mk5s, and 3 nx8 4-32x50. I do agree about the darkening, but never found it inhibiting till 24-25x. Have had zero issues with eye relief, even on my norma improved, the eyebox is only an issue if your form/stock gives you inconsistent cheek weld. Edge distortion is noticeable, but in the center, I see little image differences vs my atacr 5-25x56 or the pair of mk5hd 5-25x56 or the 7-35. I got all mine nx8 for 1750$ brand new, the March retails for close to double that price. You're going to sacrifice some features when you cut the price in near half. Parallax is the major down fall of this optic, but hey it is on the March 3-24 and 2.5-25 scopes. They're short body 30mm tube small obj scopes with massive erector ratios. There is a reason nobody is trying to mimic this design much, you have to cut corners to make it work.