I really appreciate the ability at Costco to scan with my phone as we pick up items. Check out becomes a breeze. But I absolutely hate self-checkout grocery stores unless I just have a few items. The idea that I'll run a cart full of groceries through self-checkout is insane. Not only do they routinely not have accurate bar codes requiring some sort of lookup from an attendant. I'll have things which require human clerks to "approve" anyway like wine. In addition, my self-checkout lines don't have the full conveyors like the human checkout lines. So everything has to be moved from cart directly to bag and there isn't enough bag space so you have to start putting bags into the cart which still has groceries. The whole thing is a mess and I hate it.