I use my rangefinder for the reasons everyone has stated above. I generally don't shoot past 30 for deer, but if the right opportunity presented itself I could. This year I took my best buck thus far at 32 yards. I knew before the shot that the deer was at 32 yards because I had earlier ranged the blowdown he was standing next to when I shot. Because of this I was able to simply aim and shoot. I'm also a bit anal and when I pick a spot on a deer (something everyone should do) I want to hit that spot. You can't do that if you are guessing distances. It's just a little bit of extra confidence, and as Rick James said if the right opportunity presents itself for a longer shot, I know I can find the exact distance.