Super convenient. I've used this system on many walks/runs now - it's such a relief to be able to run with the dog and not hold a leash. Not to mention that my dog goes though periods where she likes to pull, and with the leash attached to my waist it's slightly less annoying. Both the waist and the leash length are adjustable, and being able to unclip the leash is convenient when I have to get the dog into the car but don't want to take off the whole belt. We're 9 months and and no incidents, it's held up fine. If I lose this one, I'm certainly buying another.