I've used one on the last two cruises and I won't cruise without one anymore. You hang it over the closet door with the pockets outside of the closet. You want to know what we put in ours?
Extra batteries for the walkman
Snorkel and mask
Battery charger for the video camera
Imagine all this stuff piling up on the vanity top or beds. It's a great thing to have one of these to keep the room clutter free and always know where that "damn" thing is!