I don't use my strap while climbing up with my climber, it would take me 1/2 hr to get up the tree. I just go up easy and safely, and so far have not had any problems. But I always wear it once I'm stopped where I am going to be.

In fact, it's weird...kinda like wearing a seat belt in a car. I feel naked without it. Last year one time, I forgot my belt...and didn't have time to go all the way back and get it. I felt weird the whole time I was up there. I think what makes it so strange for me, is that for years, I never wore one...and was perfectly fine 20' up.