Took a set of these on a long trip to Japan, and they helped me to organize my clothing.  Particularly helpful as I was carrying part of my luggage in a backpack, and sending heavy suitcases on to cities scheduled later in the tour.  It's better than plowing through an un-organized mess of stuff in the suitcase to figure out what to put in the backpack and what to send on.  However, some people claim that it helps you to pack more clothing in a suitcase, and I don't see that it helps much with that.  The cubes are well made and I think they are likely to last for a few more trips.  They're inexpensive enough, so worth trying to see what you think.