Light, durable, variety of sizes and shapes. I love using these when staying in a hostel or gite when climbers or skiers have all their gear and cloths jumbled under their bunk i can easily find mine so that i can be the first one out the door in the morning. Good for all around travel.
helps keep my suitcase organized. quality seems good - zippers run smooth, and see through tops make it easier to see what's inside. I also highly recommend getting different colors. I know my green one has my socks in it, for example.
The retail price seems a little high for a few scraps of fabric and a zipper.