Costco is great IMO. Excellent prices on beer/wine/alcohol, dog food, organic eggs, meats, bulk household supplies (dish soap, laundry detergent, toothpaste, paper towels, TP, etc.) and TVs. Fill up the “nanny” car, a gas-guzzling HD2500 Chevy Suburban, every other week so long as the lines aren’t too long. Last Sunday I saved over $30 dollars shopping at costco on just two purchases — filled the ‘burb up with 35 gallons of fuel ($13) and and picked up a bottle of nice scotch whiskey ($21) vs. purchasing at local retailers.
The gas savings on one vehicle justifies the cost of the executive membership. However, I have found the gas lines not worth the wait/time when filling up my more fuel efficient/smaller fuel capacity vehicles.