With multiple pockets I have options to put special treats in one place and regular in another. I can carry a toy or two for rewards also. It is easy to buckle on and remove, and my clothing no longer requires pockets or a loop. I like to practice how I would need to be at trial (besides the treats). In training I bring my dog to the start line on a leash. I can put the leash in a pocket and have it handy when we are finished instead of forgetting or needing a leash runner :) For walking, I can hands-free carry water, phone and poop bags and other needs. A great grab and go!