So much time and money spent on our local Walmart, Costco, and Target stores to put in self-checkout lines. Costco is especially annoying. Attempt to grab the hand scanner and scan your membership card before scanning the items, and an employee will fetch the hand scanner first with some sort of snotty look on their face.
I've gotten so used to setting up my items in the cart to be quickly scanned at Costco that I now just head to the regular checkout lines where very few are using. The checkout workers are pleased to see nearly everything lined up, and I get a more pleasant checkout experience.