My husband and I ate at the Big Texas Steak Ranch last summer and even though neither of us attempted the 72oz challenge, we enjoyed it a lot - it's pure kitsch. The food is not amazing, but it's in good quantities at cheap prices. Even the cocktails are huge: 20oz (=1 UK pint). What your article doesn't mention is that there's a motel attached: with cow print bed spreads and other wonderfully Texan touches. We stayed in the motel and had breakfast at the restaurant the next morning. It was all you can eat with steak included in the normal line up.
Beth, London
Awesome, I'm off to Texas!