LAS VEGAS — A key executive behind Amazon Go, the online leader's much heralded cashier-less grocery store, says she was surprised at how many customers were hesitant to just walk out the store.

"What we didn't necessarily expect was how many people would stop at the end on their first trip or two and ask, 'Is it really OK if I just leave?'" said Gianna Puerini, vice president of Amazon Go, which opened in January in Seattle.

That was one of the insights she and another executive shared at Shoptalk, a retail industry event that kicked off its four-day run Sunday. Puerini also noted that the best-selling item has been chicken sandwiches. Other popular items include meal kits and fresh fruit. Puerini said the store is geared toward people who are hungry or in a rush. She says that she's pleased at how many customers come back frequently.

To read the rest of the story, please go to: Associated Press