I am really enjoying my free trial of their home delivery service. I have learned to order the Walmart brand products as much as possible as they will substitute you to the higher priced national brands if they are out of stock of the Walmart brand at no extra charge.
Case in point: I ordered a 24 oz Walmart brand bottle of ketchup for 88 cents, but they were later out of stock, so they substituted a bigger size (32 oz) bottle of Heinz ketchup that goes for $3.29 all at no extra charge. I just had to pay 88 cents for the original item before substitution.