I bought this for airport security and am so happy.  No more having to dig all my camera equipment out of a carry on or other backpack when they say please take out your camera equipment.  Security can just unzip the side and can see everything.  I just wish the top space was a little bigger for personal items.  But when we get to our destination we put what camera equipment we don't need for the day in the safe and use the extra space in the camera part for more storage.  Also love the side zip for getting out my Canon Rebel easily.