I'd had a terrible experience on Cathay Pacific where they couldn't figure out my normal TSA-Approved pad-lock and proceeded to cut the zippers off of my baggage (they paid for it but what a hassle). So I thought that perhaps since this one has a thin cable that if someone really wants to cut something they could cut the cable instead of my luggage.  I used this for the first time on my checked luggage for a recent flight, and while it is a cool design, TSA in the US clearly didn't understand how to re-lock it, and probably didn't really spend much time trying to figure it out. When my bags arrived the lock was dangling unlocked -the TSA key opens the other side of the cable so I could tell it had been opened but not re-locked. Given this, I wouldn't use it for my checked bags again.