When I saw these bags when I was younger, I never understood the appeal. Now that I'm older and saw it in person, I saw why it was and is so popular. It is super convenient-you can fold it up and durable. What's nice is that the company offers to have the bags fixed (for a fee) if you have holes or the stitching comes apart etc. It is expensive but it is worth it. Well made and goes well with almost all clothing styles.
Of course it's great for traveling as well.