I have a Leica 1600, It works Flawless everytime, I like the fact that this 1 doesn’t have all the Bells n Whistles of other Rangefinders, i had 2 different Leupold’s but Got rid of them due to all of the Cluttered junk in them, I wanted a Rangefinder that gave me Instant, Reliable Yardage Readings, And NOTHING else! I could care less about Temperature, incline, Bow or Rifle etc. etc., The Leupold’s i Had were HORRIBLY Cluttered, It was easy to have them Set on Bow, Or something else that caused problems when Ranging. My Leica is Simple, And Very Reliable, i have Ranged Reflective Targets all the way out to 1,960 Yards, It will read 1200-1300 Yards INSTANTLY on Just about anything, Hillside, Trees, etc.