What has your experience been with having a Costco membership and credit card?

So it’s just my husband and I right now. We’re doing fine financially and basically just get groceries at Grocery Outlet and Stater Bros for items we don’t find at Grocery outlet. We live south county near Lake Forest.

Basically I’m trying to see if getting a Costco membership and card would be saving us money or costing us more money. My husband thinks we’d end up spending more money if we did, but I disagree.

I’ve also been looking into appliances for my work office (small fridge and microwave) and husband has been wanting a deep freezer for meats and frozen stuff.

So what has your Costco experience been and is it worth it for 2 married people with no children and a house cat?