As a runner, hiker (havent tried with biking yet), this has been a game changer. We can take our two pups on adventures and its a massive energy saver. Its also a good training tool to teach them to stay close on hikes. Adjusting is a breeze, and we love the ability to easilu take off our waist and attach to a tree, pole, bench for social gatherings at the brewery or breaks during walks/hikes. Highly recommended for active dog owners!