Works as expected and appears to be durable enough for casual security. Was not able to open the lock blindfolded (many locks like this can be opened in 30 seconds without knowing the combination).
If used on zipper pulls, be sure to zip-tie and use a sliver of duct tape to secure the lock to one of the zippers which prevents losing the lock when TSA doesn't properly engage the shackle. My last trip, TSA managed to properly lock only one out of three of my locks on checked bagged, only because I was there to supervise the inspection of my bag. The other locks were saved from being lost using the above technique.