My Rimowa already has the TSA locks, as it is a relatively new one.
Doesn´t save you from having to open them though.
I´m Cabin Crew, we always have to stand next to the x-ray machine until the TSA are done with our baggage. I thought I was o.k. having those locks, until the TSA guy asked me for the combination, as the master key had been "put away for the day". At 5pm obviously the day is over for them. He then managed to change the combination, which made for half an hour of fun when I finally came home.
But I will say that I´m thankful for him asking, and not breaking them on the spot, which has also happened on previous occasions.