I travel a LOT for work, and I cannot tell you how many luggage tags I've gone through over the years.  They tear, they break, they crack and peel.  Given that history, I tried these with rather low expectations, but I have been rather pleasantly surprised.  After more than 25 trips, these tags have worn well, with nary a crack to be seen.  I now have them on all of my bags.  My only complaint,, and it is a fairly minor one, is that my steel wire cable luggage loops do not fit through the slot.  The plastic ones that come with it do work fine, though you do have to stretch the plastic cord a fair amount to make it fit on the luggage handle.