I have 3 NF on rifles one the 300WM shot the mile at fouled bore in OK, and my wife has one on here 6.5 CM RPR I have nothing but good to say about them. If properly set up everything adjusted etc… I have never had an issue. And just did the 25 moa tracking target using a plumb bob to set target and her 6.5 and my 300 where spot on 5 adjustments of 5 moa steps up and 4 at 10 moa box at the top. Both did well. For me it's all about tracking and clarity. All the "eye boxes" seem to be better for me than most. I have just stuck with them through the years so I may be a bit biased, but like everything else it's all subjective, go with what you like, and serves you well. I had a Leopold a long time ago (several decades ago) and it served well and they had a great warranty then with good customer service I can't speak for them now though.
Good luck
Nick