Target and Wal Mart also both now carry the TSA locks. They have a little green diamond on them and say TSA approved. I bought a pair after our January trip when I opened my luggage and found the little slip of paper saying they had been inspected. I couldn't figure out why both of my suitcases were chosen and neither my son's nor my GDs were. There was nothing in either suitcase that should have set an alarm off. Nothing was missing thank goodness.
With Magic Express more people will be handling our bags and so there will be an even greater chance of things coming up missing, so I decided I would just feel better if I had the TSA locks. That way if TSA needs to inspect them fine, but if the locks are cut off, I'll know someone besides a TSA rep was in there.