These scopes are great if you get a good one. With that being said it is very difficult. I sent my first scope back after 2 trips to the range. It developed grease spots inside the glass presumably assembly lube. The second scope made it 2 months but then the cross hairs shifted inside the tube and were of by 20 degrees. Then my third one showed up went to the range and sighted it in but while doing so noticed the turrets were incorrect. Instead of 1/8 moa a click mine was around 3/4 moa a click I got 3 rotations from the bottom to top of elevation 15 moa on their scale. And sitting on a rifle capable of 800yd shots this is unacceptable. Overall very poor quality control. Also noteworthy if you have so send it back expect a month until you see a replacement.
Pros: Clear glass and all the options you could ever ask for
Cons: I have sent 3 back in a year.
This review was written in the old system and had content requirements that are different than reviews written today.