Shopping features aside, there is something more to Costco that cultivates such a loyal fan-base.
"Costco relaxes my soul," said John, the founder of the I love Costco blog. And he's not alone in his sentiment.
"I do love that everyone at Costco appears to be relaxed humans," said Ellinger. "I love overhearing a weird personal conversation between two employees unloading a box and knowing that Costco is a safe space for people to just be people."
With such a large selection, Costco has the ability to permeate every sector of life. Matt from Costco Insider proposed to his wife with an engagement ring from the warehouse store. Ellinger had a birthday party in the Costco food court and once took a date on a trip to the warehouse.
At its core, however, Costco is still just a store, selling everything one could need to survive in bulk.
And for many fanatics, that much is enough. As a Colorado fanatic put it: "Who wouldn't love that?"