The retailer recently extended earlier shopping hours to executive members. But now, the change is receiving mixed reviews.

When Costco announced earlier this year that it would reintroduce early shopping hours for Executive members, reactions were mixed. Some retail experts and members applauded Costco for rewarding Executive members with extra perks.

Here's when the pros say to go to Costco. The best time to shop Costco varies slightly based on location and time of year, but these are the best days and times.