I purchased two bags at the same time, your standard sling bag and the older version of the anti-theft bag (the one with the snap which was awful). With the main goal of trying to find the smallest, most comfortable bag to hold my sketchbook and everything else for a trip to DisneyWorld. So the bag needed to comfortable hold a 5x8 sketchbook, a set of watercolors and pens, plus the day to day theme park visitor items such as my wallet, sunglasses, sunscreen, a rain poncho and even a small bottle of water. It worked great! everything fit and was easily accessible, the bag was light and easy to open for security. Plus once we were at the park I started to notice a lot of people have discovered you bags. Really is a good size between hip pack and a larger backpack.