I have the hands-free light series bundle with 4 high-security leashes. When I started walking dogs, I purchased these because I wanted the dogs that I am walking to be safe. I would never forgive myself if a dog suddenly pulled his leash out of my hand and ended up getting hurt.
The added bonus of the "hands-free" part is so great. I can't have my hands full while trying to wrangle 4 dogs and, of course, picking up what they leave behind. I often need to change the podcast I am listening to or drink my coffee as well. You know, important stuff.
In all seriousness, this system is extremely well-made and TOUGH. It gives my clients and me peace of mind.