Feels solid, easy to set combo, easy to unlock.  The "opened" indicator is nice, but really of no use generally.  If someone at TSA goes through your stuff then you'll know it and if someone else with a TSA key goes through it you'll never get anything other than a CYA statement anyway.  Unfortunately, my high end hardside luggage was so badly cracked and mashed in after flying on Alaska last time the lock would have not  prevented anything.  But these are well made and WILL keep casual thieves from trying yours before finding something easier first.  Peace of mind is not going to come from a lock by itself but I travel a lot and it sure helps.  And if you have these on your carry-on and personal item then only the people allowed to look through your stuff will take the time to do so, and do it in front of you which is just fine with me.  The criminal element doesn't want the challenge these locks provide, so he or she will just skip you and go find a purse or unlocked laptop bag to grab and run.