If you have experience in grocery stuff, HEB has cultivated a reputation of treating their employees well, unlike WalMart. They copied Walmart's distribution strategy where they build a large warehouse hub first then expand stores. It's how they originally competed with Walmart in Texas and, in many places, it lead to them taking a large portion of the market.
That reminds me, if you head up to Schlitterbahn in New Braunfels, you can check out Buc-ee's to see what all the hoopla is about. I still haven't been to one myself, so not sure if they are worth a 10min detour just to see, but they have a lot of buzz around them.