I have owned this scope for over 2 years, kept waiting for it to let me down. Elk hunts in the coast range of Oregon are a great place to find weak spots, bottom line is I haven't found any. Fantastic clear optic in fact this past weekend on a coast bear hunt, I had a bruin bedded at 1020yds, laying next to a burnt black log. I could easily see the difference between the two and could pickout color anomalies on the log that made all the difference. I am completely satisfied with this scope, I have used the big boy optcs and other than a zeiss diascope have never looked through anything more clear. I only wish it did not have a barrel focus. just don't like em, but at an all in price of $650 I can live with it.