I always seek out bags with this kind of convertible system. It only takes a quick pull of the straps to go from a shoulder strap to a backpack; no scratchy annoying zippers to fumble with, no time-consuming clips or buckles, no extra straps to dig out. It's so handy when I'm shopping or at a museum to just pull the straps and throw the bag on my back. The bag has lots of pockets, yet they don't seem to add a lot of weight to it; it's very lightweight. I have a black one and the inside is pink. I like that feminine touch and the light color helps me see where my things are.