i feel most guys make the mistake of thinking that 15ft all the time is good or the other extreme of 30+feet is always good. i depends on cover and terrain. even with good cover though i feel too close to the ground when im in my stands that are 15-18feet up but with the cover ive never had any problems being spotted. most of the time i go until my rope stops or a little higher if i have a hill on one side of me. so usually 25feet for me.