Super useful.  So many public places like restaurants, bathrooms, and other places do not have a clean place for your bag.  Forget about floors, have you seen public bathroom floors?  They may look clean but they are not.  This purse hook is useful if you have a large bag like a totebag and you don't want the bulk on your lap when you're in a restaurant and hanging it on your chair is not an option.  You can open this purse hook and hang your big bag on the side of the table.  I did this at a restaurant that had backless stools for chairs.  This Clipa can also be used in public bathrooms which do not have coat hooks on the stall door.  You can open the Clipa and hang your bag on it then hang it on the back of the stall door.  Good hygiene helps towards good health.