A friend of mine let me borrow his for about 6 months. It was the covered turret model with illumination and International Hunting Reticle (IHR). Love that scope.
I shot it out to 1500yds on my .300WinMag (212gn ELD-X) and it performed flawlessly, actually it helped me realize that (1) my rifle was more accurate than I had previously thought and (2) my previously mounted scope was not all that.
Good scope, wish they weren't so pricey. NF set the bar and now everybody has a $1K scope! johnnyk.