For most of my shopping, which takes place at our local Walmart (I live in the US), I actually really like using the self-checkout. Now when we make a big grocery run, having a person there makes things easier because they can scan and bag, I can unload things onto the belt and my wife can pull bags off the little turnstile thing and put them back in our cart, but most of the time I'm just running in to grab a handful of items so when I leave I can just walk up to the kiosk, scan my stuff, scan the QR code with the Walmart app on my phone and walk out the door. It'll auto pay with the privacy card I attached to my Walmart account and give me a digital receipt to show if somebody wants to see it at the door. They even have a thing now where you can pay a monthly subscription for "Walmart+" where you can scan and pay for your items as you shop.