Popeye's Chicken Sandwich
I've had the sandwich 1/2 dozen times now (going back to the original launch) and have never waited more than 20 minutes from walking in the door to walking out with my food.
That said, they have the store on St. Charles plastered with advertisements about ordering online and a separate register for pickups. Today I thought to myself if it will save a few minutes lets try it. Downloaded the app and wouldn't you know it, in traditional Popeye's customer service fashion, the sandwich is nowhere to be found when ordering on either their website or app.