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 762 autocomplete suggestions examples.)

The screenshot was taken on May 22, 2020 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.