What is the benefit of using an Amazon Locker rather than shipping to your home? Maybe in neighborhoods that have a high stealing packages percentage.
The term lockers also imply (incorrectly) that they are supposed to be purchased by people for packages to be shipped to (like a PO box), the name might be hurting their success.
I can't find anywhere on any of the Amazon Locker pages where it lists a single benefit of using the lockers, http://www.amazon.com/b/?node=6442600011&ref=locker_fd_brws