I purchased 4 of the sticks when I saw them on some video's from one of the shows. I will tell u these sticks are AWESOME, they grab so well to each tree I have tried them on to the point that when the rope is removed they are still stuck to the tree and it takes a little effort to get them off. The Design is so small and the stacking is awesome. I just posted a couple video's on them, the one below if u want to check it out show's how easy they stack, attach to the tree. Time will tell on this collapsible design, but they are working great.