I really like my Synapse 19 that carries two camera's with lenses, an extra 70-200mm lens, water, photo gear and all the fruit bars I need when I am in the air or on the ground.
I was doing an air2air photo shoot and left my almost empty Synapse behind the hangar door. When I got back from the flight they had opened the big hangar doors (electric motor driven) and the Synapse was squashed at the end of the left door. It had some rust marks on it and some minor tears as well as one zipper being damaged but still useable. I should get it fixed but use the 'scars" to tell people how tough this backpack is and they better get one.