I like both. If we have a lot of produce, or a lot of groceries in general, we prefer to go through the checkout. But if we just have a few items and/or the lineups are long, we head for the self-checker. We've rarely ever had a problem with them, even hubby, at 71, likes the self-checkout for those small trips.

A story about the self-checkers at the airport...my best friend was heading home after a nice visit at our place. We underestimated how busy the airport would be and encountered a huge line-up for the ticket counter...so long, that it was clear she wouldn't make her flight. We noticed these brand new self-checkers, and decided to give it a try, since she didn't have any luggage to be checked...she put in her info and credit card (for ID purposes) and bingo, she was done and walking away with her boarding pass within 5 minutes. When the people in the lineup saw how easy it had been for her, many followed her lead. She not only escaped the long wait (and possibly missing her flight), she got a great seat on the plane too! Nowadays they're everywhere, but at that time, they had only just been installed a day or two before and everyone was afraid to try them.
When you don't like a thing, change it.
If you can't change it, change the way you think about it.

(Maya Angelou)