I have a Sam's membership that I share with my sister. I don't shop there too often since I find that the deals aren't that great and a lot of their food items are short dated, so you have to eat the quickly, which is sometimes hard to do with the huge quantities. Also, we don't eat a ton of prepared or prepackaged foods.

I have had BJ's, Costco & Sam's memberships in the past. I like BJ's the best because they have smaller quantities packaged together and they take coupons. I do like Costco, but the one near me is in a very inconvenient location and I hardly ever go that way. Sam's location is very convenient for me.