I don't think it's going to make a difference for the average deer hunter but where it would definitely be handy is hunting mountain goats where the angles can be extreme (60* up/downhill) and the ranges long (30-40 yards). It may sometimes take me 10-15 minutes to sit there looking at a goat before I can convince myself of an accurate distance to shoot him for, especially in the broken, uneven terrain. I'd never seen that add from Leupold before now, man that must be one tall tree!!! I wonder how many climber steps it took him to get up there?