Expecting too much, or receiving too little? - ATN DNVM-6 Digital Night Vision Scope, 6x

I received my scope and ran out to get batteries for. The first time I tried to use it, I couldn't focus at all. Several other attempts were a little better, but this doesn't begin to be as good as the Gen 1 starlight scope I used in Viet Nam. It is extremely hard to focus at all. When I do get some focus, it's hard to change field of view without having to struggle to get back in focus.
I do think part of the problem is that this is a 6x scope, and has to narrow a field of view for in town use. However, it is much less useful than I expected.