This is a really cool bag, but there is no way it's 36L.  Other reviewers have complained the handle eats up some of the packing space, and that has to be what's going on. I also have the Ozone Osprey backpack that is "35 L," and it fits SO much more.  I am only taking off one star for that, because the bag is great quality. If you can get by with less liters than advertised, the bag is really lightweight and easy on the back. I packed it fully and had no issues with tipping.  I did not run with the bag, so maybe tipping issues occur when one is sprinting through an airport?  Just walking casually with the bag results is no issues.