Definitely a nice bonus item that solves a problem I didn’t even know I had! It’s stretchy & fits on my Flagship planner perfectly, keeping it closed when transporting/carrying. I only take it out of the house when traveling, but if you’re a frequent traveler or for whatever other reason carry your planner with you, it’s worth adding to your cart! The 3-pack is nice if you share some with friends who also have a Day Designer (what I did) or if you buy different styles every year—the various colors might be good to match different patterns. I love the mint green band with my black stripe planner, giving it just a pop of color!