No problems mounting and zeroing it on my .270. I have fired 35 rounds with it and went to the range to check my zero after going in and out of the woods 8 times, and keeping my gun in the car for a month. It was still dead on. Be sure to use thread lock on every single screw when mounting it. I have no plans on replacing my scope unless I start having problems with it (time will tell), but I do plan to buy another for my small game rifle.
Pros: Illuminated
Cons: Time will tell
This review was written in the old system and had content requirements that are different than reviews written today.