On this page there’s 7 highlights (view in Baymard Premium) outlining what Costco are doing right and wrong.
(Tip: use the arrows above or on your keyboard to navigate all 692 autocomplete suggestions examples.)

The screenshot was taken on September 17, 2019 and depicts Costco’s Autocomplete Suggestions. In total, we’ve reviewed 65 of Costco’s page designs. To see them all, visit the full Costco UX case study.