I’ve used the original for probably 8 yrs or more. It’s never given me an issue. Been very solid. I’ve ranged reflective targets to almost 2200 yds. It will give you corrections to 1400 yds. I think the only down fall I’ve had with it is I couldn’t get a range in an extremely heavy snowfall. With that being said, lots of range finders have that issue. Let me know if you have any specific questions