I do all the shopping, have for years.
When the super Walmarts opened, I started getting the groceries there and saw a solid 20% saving over Kroger and Publix.
Walmart still beats them, but not by as much these days, closer to 16% near as I can make it.
But, I have found a "scratch and dent" grocery wharehouse. If you are up on current prices, you can really find some great deals.
Name brand dog food for less than 1/2 the price as Wallyworld.
Also, they get resteraunt packaged frozen foods that are really good deals. Large Frozen pizzas, $2. 3 large frozen pizzas $2.50 (broken in several pieces, but not bad).
Frozen fish fillets, 1.50 to 2.00 a pound, great stuff.
Coffee! Restaurant grind for $2 a pound, and you can really taste the difference.
Sausage, $1 a pound. 12 ounce gags hard pretzels, 4 for $1. Many more deals like this.
Some stuff is the same or more than other stores. And they have a real meat dept, with a butcher and fresh cuts of meat. All in all, it is a must stop on the way to do my regular shopping.
The only down side is I feel like I am shopping in a 3rd world country, not because of the customers (they are mostly good hard working folks, not typical Wallmart types mentioned here often). And I fear this is the future of commerce in this country.