I get all of our Pull-Ups, baby wipes, bread, canned foods, frozen snack foods, chips, school snacks (individually packed items and juice boxes), meat, pantry staples (sugar, flour, spices, condiments), detergent, fabric softener, deodorant, toothpaste, shampoo and conditioner at Sam's because they are cheaper than the other stores in our area. I don't usually get any of their fresh fruits of veggies because they are usually pretty damaged in the store and rarely last more than a few days once we get them home.
I would suggest that you take your storage space into account when you are shopping there because it is very easy to end up with more than your can comfortably store.