I've been using these for a few years and they really do help with planning your shopping trips, remembering to make a note of items to replace after you've used them up, and to a certain extent it also helps with hitting up each quadrant of the store in an efficient manner. When we hit the store, I'll cross stuff off as I go to make sure I don't miss anything. And sometimes I'll task my partner with grabbing 2-6 things at a time from nearby sections of the grocery store while I'm taking care of other parts of the list, and then we're in and out twice as fast.