Many suitcases now have a built-in lock (often TSA-compliant) that attaches to the far end of the zipper pulls as shown in the image below. What are the advantages and disadvantages of this type of locking system?
This strikes me are unreliable because in my experience, zipper pulls very often break off. Most suitcases I own have a thick loop at the base of the zipper which is used to pass through a lock and is quite sturdy. Also, since the lock is a separate item, it can easy be replaced when it does break in any luggage store. If one of those built-in one breaks, the suitcase would probably have to sent in for repair.