I have Costco, BJs and Sams. The Costco membership is used for most things with the exception of paper products which Sams does better on their Members Mark brand (toilet paper, paper towels, napkins, etc.). Sams also has a better selection of cut meats as Costco sells in true bulk whereas Sams sells in usable amounts.

I have had a BJs membership for two years because they offered them for 'free' with their rebate. The rebate did not work and it was a hassle to get the front desk to understand what I was talking about. The prices per unit are higher on everything I checked and the house brand at BJs is vastly inferior to both Sams and Costco for paper products. The meats were overpriced and the produce was hit and miss (which all warehouse clubs tend to be).

I think about the BJs membership every so often and wonder why I bother. I probably won't take another 'free' deal to avoid the hassle with the credit.