When I was searching for a backpack that I could use everyday and also on occasional short travels, I wanted a backpack that's big enough to carry all my every day stuffs like a laptop, iPad, accessories like cables, charger, hard driver, powerbank, umbrella to shield the occasional showers, drink bottle without it being too big or looking too bulky. On the flipside, I also would like one that is expandable if I need to store my clothes & other stuffs for occasional short travels. FYI - I have used the XD-Design Bobby Bizz for about 3 years and one of the strap attachment broke, and another few weeks later, the zipper came off which was not of great quality at all. Looks good when you look at it for the first time but after you using it for a while, you can feel that the material quality is relatively inferior. So I went out looking for a replacement backpack and read all the reviews and pulled the trigger on this Sterkmann. I opted for the Sterkmann as this has a lot of pockets and compartments that were well made and very practical for my use. So I am really happy with my purchase and hope it will last me for many years to come!