I buy the majority of my meats there. I track prices at other shops, and I check the RFD thread for Costco West. When a meat I eat goes on sale, I compare, and then go buy in bulk if it's a good savings.
4 hours of vacuum sealing on a weekend is less than fun of course.
We got some other occasional items, but we try to keep it to a minimum as it encourages over consumption of both food and random crap.
Family of two, i spend enough for a free executive membership each year.
I can eat more hot wings than you.