Shot the same exact shot he was talking about using the actual distance reading on my Bushnell and missed high...twice. Shot the exact same shot using the reading on my leupold and it was right on with a 7 yard difference in readings....bending at the waist every time of course... Spent a half day and took both types of RF out and compared them in many different settings and elevations because I couldn't see how it could make that much of a difference and still had the same results. The Leupold was dead nuts each time. Do they work???? For me they do and take the guessing out of if. If I have a booner stepping out i do not want to be guessing and second guessing my shot placement. Thats just me! No Scentlock for me either!!!!!!!