I am doing better with wearing a harness these days. Back when I strictly used a climber with a gun rest I never did. I felt safe just because i was completely surrounded by tree stand. Since i have went to using some hang-ons as well I always use a harness in one of those. And now when im by myself i always use a harness whether it be climber or hang-on. It took me having a wife and kids to start thinking more along the lines of safety and that someone's wants to see me get home in one piece tonight. I am also more cautious about what tree I set-up in too.
Safety first, wear a harness, do not be another statistic.