I compared this lock to the Lewis N. Clark TSA card lock, and it looks like they were made on the exact same assembly line. For the price, Get this pacsafe one. A couple bucks more, and you get TWO locks and TWO cards in the package (same combination for both), the Lewis N. Clark lock only includes one lock.
<a data-hook="product-link-linked" class="a-link-normal" href="/Lewis-N-Clark-Tsa-Key-Card-Lock/dp/B003GAMOJQ/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Lewis N. Clark Tsa Key Card Lock</a>

It's handy little lock. I'll update in a year how it holds up. I really like the non-metalic keycard that I can keep in my wallet. Makes life easier at security. Only downside I guess is that the lock has about 2x the mass of a little key lock, but it's about on par with most numerical combination locks, maybe a tad smaller. Appears to be built sturdy for a luggage lock. Just remember it's a deterrent, nothing more :)