[jeffchien]

I will gladly do the work myself if it means not being stuck behind people chatting up the cashier or doing complicated coupon/return/exchange/gift card transactions. The value is in the consistency and predictability of time spent for someone who just wants a single bag of onions or a single T-shirt. If stores had no-BS lanes (more than just "X items or less" lanes) operated by human cashiers I would use that too, but I suppose we as a society consider it as impolite or bad service, so machine checkout it is.

[TeMPOraL]

> The value is in the consistency and predictability

"Consistency" and "predictability" are not the words I associate with self-service checkout. Maybe I'm spectacularly unlucky, but almost every time I use one of these machines with more than 3 products, the machine will get confused about the weight, or decide to randomly check me, or find another reason to lock up and have me wait for a clerk to show up and unlock it, which takes anything between 1 to 5 minutes. And I'm not the only unlucky person, either - I see it happening often enough to others, which usually reassures me that I made a good call standing in the queue for the old-fashion human-operated register.

[jeffchien]

That's still a lot more predictable than my human cashier experience. I wish I didn't have to dread being held up by the only cashier in store holding a riveting conversation with 4 groups in front of me. Will the other groups hold up the line too? I guess we'll see!