I used to love using the self-checkout. But then it became a trend among the corporate overlords here to get all paranoid about people stealing food, so now they have the weight system calibrated too strict. Now if you breath on the items in the bag it locks you out and someone has to come unlock the system to continue scanning. So it's not really worth the hassle, and seems kinda pointless since an employee has to unlock the system after every few items.
Most stores around me thankfully don't even use the weight station. I don't even think Walmart does anymore since they "upgraded" their checkouts recently. (The self checkouts have completely taken over and have a sort of open floor concept going on.)