I come here to buy formula for my baby and the store is always extremely busy. I recently saw the scan and go app for Sam's Club and decided to download the app. While I was in the store the lines were so long. I scanned my items and checked out on the app. Went to the door and they scanned the receipt from my phone. The app was so easy and convient. I probably would have been in the store for a long time. So glad I used the app. I was in and out the store.