Some serious thought went into this daypack, and I think it's exceptional. This 12L pack fits a great deal more than my prior 17L pack because of its design. After using it for daily travel and outdoor adventures, here are some of the features I've come to enjoy:
* The daypack is sturdy and easily stands upright, even when empty, so that it can be packed.
* The large opening on the zipper pulls make them easy to hook and pull the zips one-handed.
* The numerous pockets are well-placed and lend to how easy it is to use and organize this bag. My 13" laptop fits just fine in the laptop sleeve.
* Overall, the daypack performs like a suitcase in backpack form, especially with the large handle at the top, but is still slim to wear even when packed to the brim.
As others have said, the side pockets for water bottles are a bit small, but they do hold my 20oz water bottle.
On top of this, the One Trail team is really excellent. I ordered my pack initially on Amazon and it arrived missing the bungee cord on the front. When Amazon failed to respond to my inquiry or resolve the matter, the One Trail team did so directly after I emailed them. I highly, highly recommend this company.