How many of you wear a harness when up in the tree?? And how high do you like to be in your stand?

I just got another 15' ladder stand and this one is just a seat up in a tree pretty much with the ladder and im not very comfortable up there, let alone standing to take the shot when the time comes...I just set it up in the backyard to do some practice, and well that didnt last long...lol

Which safety system do you prefer? 15ft seems really high with a bow..