While there is no disputing ATN build quality or customer service, these Gen1 scopes do not compare favorably with more modern alternatives. Looking through one is much like peering through a "fisheye" peephole into a murky environment of greens & greys. Limited functional field of view & low light transmission. My advice would be to accumulate money for something of a later generation (even Gen2 is significantly superior). Sure, you are "in the ball-park" with these systems, but these days the bar has been set far, far higher than these heavy, opaque scopes can meet (and then there's still the paperwork). Contrasting, say, a Gen3 Pinnacle tube to one of these is similar to comparing 20/20 vision to life with cataracts.
Pros: Easily affordable, Rugged construction.
Cons: Heavy, Low light transmission, "Fisheye" effect, Needs aux illuminator.
This review was written in the old system and had content requirements that are different than reviews written today.