I purchased this a while ago and have been storing it. I no longer have the opportunity to use it... I'm selling it because I'm short on money (;_;) This bag is ergonomically designed to be user-friendly and easy to use. With a single button, it opens wide, and it seems very easy to use with its well-organized compartments! It has a simple design that can be used in various situations. I hope it goes to someone who can use it while it's still in good condition.