Is Kroger's store cheaper and better than Wal Mart (need help and education on these viewpoints)?

I am getting told by this girl all kinds of things that don't make sense to me. She tells me that Rent A Center is cheaper than other stores that they are a better deal because they will fix your things. I tried to explain to her if your credit is good you be good to go to a store like Sears or somewhere else. She is telling me the products at Rent A Center are cheaper. She told me I was like a kid that doesn't listen and I let people use me that it I was like talking to a wall.

She told me buying in bulk is not a good idea because she don't eat all the food. And she had apartment before and knows that it is cheaper to shop at Kroger's.

And I am told by her and her father both that food is cheaper at Food land and Kroger's and even better quality than Wal Mart.

How come do some people think Rent A Center and Kroger's are good deals? They have commercials saying food and products are cheaper at Wal Mart and good quality. Than she says you can't believe what I hear. It is like I am not going to win with her because she ends up ridiculing me even know I know she is losing money shopping the way she and her father thinks.

Is Rent A Center a really good deal on prices and services?