My Dad and I bought a pair of them (6.5-20 x 50 LR) last winter. Early this Spring, Dad's had something go wrong internally. At 200 yards, a 3MOA adjustment moved POI exactly 3"! This was very clear and repeatable.
He sent it to Leupold. After waiting 3-4 weeks it came back with paperwork implying that nothing was wrong with it. However, after mounting it and test firing it, it worked fine under the same circumstances. When he called Leupold to inquire what they had fixed the response was, "Just take it and shoot it. Let us know if something is wrong." Very poor customer service.
After about 20 rounds on his 6.5WM Sendero, it screwed up again. This time when making a vertical adjustment, the entire erector assembly was screwing out of the scope! That was the last straw with him and fortunately the Gander Mountain where we bought them gave him a refund. Up to this point, my scope had worked flawlessly. Dad now has a Nightforce.
Within a couple days, my scope had the exact same problem with the erector assembly backing out of the scope when making vertical adjustments. Gander Mountain refused to give me a refund until I had sent it back to Leupold at least once (fair enough). I called and talked to the manager of technical services and gave it to him with both barrels. To be fair they did respond quickly. They sent me a UPS shipper and had the scope back in my hands with a test target in about 5 business days. That was about three weeks ago and the scope is still working fine.
Take that for what it's worth........
