I have used a tree lounger tree stand for the last 30 years. It is the only climber I don't use a harness with. I have never had it slip or had any problem. I think next year I might start using a harness. Getting on up in age will be 66 this year so its maybe time. In my opinion its the safest climber made. I have two of them. The only thing I worry about is maybe a mechanical break. Its the only stand I know of you can fall asleep in and not fall out.