I have loved that you can walk into any Walmart or Sam's Club location with your smartphone (no app needed) without waiting for someone else - then pay as soon as you're done shopping! It also makes it easy when there are multiple items to purchase since each one is automatically scanned so no need to keep going back over things before paying. Sometimes we forget our wallets/cards but not always able to remember which item was last purchased. Also sometimes you may see something while walking around, like an article laying out by the register where your groceries were placed, etc., that doesn't get picked up until after checking out even though you had already paid. This helps reduce theft so much since once everything has been checked out nothing gets left behind if forgotten. The time savings alone make it worth trying.