I've owned 5, this was the first with a real problem.
First, I've owned 5, this is the first one with a significant problem. It took two trips to the shop, with all that entails with shipping and waiting. I was very displeased as they failed to fix the important problem that was resolution. The third time was the charm, they sent me a new scope, and it works every bit as good as an XD should work. Everyone involved in customer service was there to help, responded quickly, and in the end, got me a scope worth what I paid for. It's nice to never have a problem, but it's nice to know that when you do, ATN will stand behind it's fix it or replace it warranty.