I have many backpacks, but this is my first cooler backpack. I love it. Pros: • Easy washable material. I got it soaked in river water and it cleaned up nicely with a damp sponge. • Nice zippers, open and close without issue. • Front bungee cord seems useful and cinches up pretty tightly. • Straps are thick and comfy and fit well on me (5’11” 200lbs) • Mostly waterproof. I had this fastened down to my kayak which rolled in a river. Later upon getting back to shore I noticed only a little bit of water had entered the bag. I knew it wasn’t supposed to be waterproof, but it’s pretty darn close to it. • It kept my stuff cold. I did not check temps, I did not evaluate scientifically – I just used the backpack every day for a week during a beach vacation. • 2 main areas to hold stuff are fine for what I need. (1 main and 1 front small pocket) • 2 side water bottle pockets are great, too. Held a large bottle of sunscreen and a med bottle of bug spray just fine. I never put water bottle in them. • The silver lined insulation is pretty thick – thicker than any of the lunch bags, boxes, etc. that I have for my kids. • Note: first time using it was for 5 straight days of beach use at 86F+ temps: I usually put 3 bottles of water, 4 cans of soda, a packable beach blanket (think parachute material), 1 2.5lb Arctic Ice Chillin Brew Series Reusable Cooler Pack and a few other items in the large pocket with my phone, charger, wallet in the smaller pocket. Both pockets had room to spare. Whenever I first checked email (was on vacation) for the day I took out my glasses and phone and both were so cold condensation appeared! Drinks were always cold. The Arctic Ice Chillin Brew Series Reusable Cooler Pack partially melted after the full day. Every night around 6PM I would empty my backpack at the house, and any leftover drinks and the ice pack were still cold. Love this backpack. This is just normal use, no tests, no thermometers. BTW I saw this bag’s review from someone who used it a Disney World I can totally see myself taking this to theme parks, cruises (updated: 6/24: has been to Disney World and a Disney Cruise now still awesone!), etc. awesome. Cons: • The handle is a bit thin, I wish it was thicker or covered with plastic/foam of some sort. • I don’t like the waist belt and I don’t use it. Wish there was a way to remove it and reattach when I needed it. • Zippers aren’t waterproof, but they are close. The 4-minute river submersion only yielded a little bit of water (less than an ounce for sure.) Overall, I highly recommend this backpack. TIP - One new thing: I now use this backpack on every vacation. I fill it up with the normal stuff I would put in my backpack while on the plane using a large grid-it organizer – action cams, chargers, cables, gadgets and gear all fit into the grid-it, then I slide the grid-it into the back pack. Once at the vacation spot, the grid it goes into a drawer in the room and the backpack is used daily as a cooler and carry-all for the day. Love it. I just need another family member to carry one too so we can double the amount of drinks/snacks! 5/11/2020. Removed 1 star. I use more frequently during the summer, but recently took it to the mountains for a weekend. I stuffed a thin hoodie into the outside stretchable straps and 2 of the strap holders pulled loose from the backpack. The rest of the backpack is in great shape, but this failure makes it look a little odd. That's too bad.