Our closest Costco is a 20 minute drive away so bi-weekly or even weekly trips are possible.
I love it and find it excellent value for money. We eat lots of fruit in my family and the quality of the fruit is great and it is cheaper for better quality than an Aldi or Lidl and because I am only getting one giant punnet instead of many little ones, better for the environment. With a teenage boy, the snacks are great to stock the freezer with - Jamaican patties, microwave rice, peanut butter stuffed pretzels, big containers of nuts.
I stock up on cleaning products, britta filters, sonicare toothbrush heads, tinned tomatoes, large bags of cacao, organic quinoa, maple syrup, cheese, wagu beef burgers...not cheap, but I do end up saving money
Additionally, as a company, I think it is extremely well run and it treats its employees very well so I am happy to give it my money.