I appreciate the functionality of this backpack way more than I expected. Took it sailing and to little league games -- fit enough food and drink for myself and friends, and I could still carry it. At the end of a long, hot day, I unpacked a liter-sized ice block that was barely melted. I had also packed ice on top -- that was mostly melted but everything left was still very cold. It's easy to inflate and deflate. The straps are comfortable. I'm small and wish they cinched down a little more, but it's not a big deal. I easily went up and down a ladder with the cooler on my back. The closure buckle at the top is strong and secure, which makes it easy to grab and gives you another way to hold it. It's easy to clean and small to store. ABSOLUTELY LOVE IT.