I purchased these because for the first time in a long time I have to check a bag (scuba trip) and the suitcase I'm bringing is just a large open space.  In the past, I always felt that "travel organization bags" were maybe just gimmicks and that they would actually reduce the amount of space you utilize in your suitcase but, because I didn't just want to throw my clothes and other stuff into the big space of my checked suitcase I thought I'd give them a try.

I'm sold!  These cubes are going to be perfect for keeping stuff organized in that large suitcase.  We liked them so much my wife got a set as well.  I'm going on the trip early and she will join me later so I'm going to bring down some of her clothes in my checked bag (that way she just needs to travel with a backpack).  She's going to use them to pack her stuff in the suitcase I'm bringing and these will be great at keeping our stuff separate.

I've also used the small bag to organize my misc items (phone charger, sunglasses, lip balm, ear buds, etc...) on a shorter trip I took last week and it worked out really well.

They seem well made and you get a variety of sizes so I think they will satisfy most people's packing/organizing/travel needs.