I carry one because I like to be precise as I can. I don't like to leave it to "close enough for government work" mentality. I always guess ranges and then range them to verify. I range to several trees a full 360 around me. Besides that, my arrow is slugging along at 252 fps. A few yards can mean a lot. Even if I had a flatter shooting rig I'd still not rely on one pin to 30 yards. I'd want to know 33 or 27 or 25. There are enough variables in bowhunting without accepting those we can do something about. A rangefinder is a simple tool that can help and can't hurt. I hunt a lot of different places, different terrain and different elevations. The first time in a place on hill side or something is not the same as climbing in your permanent stand hung on a tree for the season. I don't have favorite stands. I rarely hunt a spot more than once or twice a year, even in years where I've hunted 55-60 days.