I had one for a couple years. Great scope!
The only issues that I ever had were ME not being high tech enough and not knowing how to work with the electronic parts of the scope. Gunwerks tech dept. was always top notch in explaining how to work things out that I didn't understand.
If you're not computer savvy,like me,it can be frustrating to learn how to use the scope. I had a guy that wanted to buy mine,so I sold it,but the scope worked great,and worked as advertised.