My wife and I purchased these for a recent trip and they worked great.  I've had similar styled locks in the past, and they were no where near as solid as these.  As an added benefit, we bought the orange ones, and they helped our bags stand out in the baggage claim as well.  I would definitely buy these locks again - if we need a few more - and recommend them to others on the fence.  The TSA indicator is cool, but I'm not sure how accurate it is.  We used the locks on a cruise, and after getting our bags in our room one of the indicators was popped up but nothing looked different or out of place.  Perhaps they do open bags, but don't bother to put the tag(s) on it like the TSA is supposed to after opening them.