I ate at Whataburger in Austin, TX, and it was only ok and not great. The Whataburger places I ate in Navarre Beach, FL, were fantastic and easily the best fast-food chain burger. I thought since Whataburger is Texas chain, it would be better in Texas. Nope. It's way worse. I was super disappointed with my Whataburger experience in Texas.
I also ate at In-N-Out in San Marcos, TX, and it was the best In-N-Out I've eaten at. And the Double-Double there was really great. Even the fries weren't half bad, and I hate In-N-Out fries. Overall, Texas does In-N-Out better than the In-N-Out I had in San Francisco, CA. I would rate that In-N-Out burger and restaurant as the best fast-food burger joint in the US. Just goes to show you how foods and experience at fast food chains can differ so much in quality from place to place. Quality, consistency, and superior customer service is so hard master and so difficult to maintain.