Lidl also has it, but no hand scanners so it only makes sense if you're grabbing a handful of products. The self checkouts aren't designed to hold a shopping cart full of groceries - that's what you have the standard registers with conveyor belts for. Same goes for Hornbach diy store.
One small annoyance in all these stores is that you have to scan your receipt before the gates at the exit will open. I've done it countless of times but still i'm used to putting the receipt in my wallet straight away. Cue me having to fish it out again. To save on paper, some stores also over short receipts that only have a bar code, the number of products and the total amount paid - because many people don't want a receipt.
Walmart here has some self checkouts that have a conveyor belt, but I’ve never used one of those.
They used to have these security gates at the entrances ghat would open on entering but if tried to exit through it would sound an alarm.
They were an annoyance and didn’t really do much good being as large the front of the store is, and shortly after they were gone.