I have one and it works great to 1000 yds on small trees, shrubs, etc. but only to 800 yds on deer, elk, antelope. I had problems, did it my self, I wiped mud out of the lens and scratched it bad and they fixed it for $15 and had it back to me in 6 days. Great service. I would recommend them to 1000 yds. I have ranged to 1300 yds on reflective stuff.