While I LOVE most of the features, there are a couple things that make the backpack a bit difficult. The water bottle pocket does not fit my standard 32oz bottle, which is a bummer. But what's more of a bummer is that even if I don't have a water bottle in the pouch, the pouch still takes up so much room inside the backpack because the waterproof fabric is so thick. It's like half the backpack room is gone because of that fabric. Also I really wish the top pocket could fit a passport. I took it traveling last week and I still had to dig for my passport. That's a huge bummer because it would be so great to actually utilize that top pocket for my quick grab travel necessities.