I have traveled over 2,000,000 air miles and as my wife will attest, I have a luggage collection with no end. I purchased my first Pacsafe suitcase for an Africa trip two years ago, and now own three different sizes. The zipper is the top feature and the overall quality is of no comparison to my other expensive bags, IE. Tumi, Hartmann, Ospreys, Eagle Creek, etc... I love the fact that I can stuff it as full as possible and know that the zipper will keep it secured during travel and locked safely in my room.