Thanks for the replies. I use one on Fenway when we're out in the woods, cemetary and ballfields. He could care less about the people walking by or the other dogs. He's only interested in chipmunks. I sometimes use them around the house but we live at the only stop light in town and it can get pretty busy. I would DIE if it ever broke and Fenway got hit by a car. Perhaps I'll use the "normal" leash around the house and then switch it when we get to the woody areas where there are no cars.

Thanks again.