I can't believe the other reviews have not mentioned the breakfast menu. One of my favorite times of the weekend is 11pm because that's when Whataburger starts serving breakfast tacos. (nom, nom, nom)
11p to 11a is the best time to go to Whataburger. They still serve the regular menu, but who doesn't have an unhealthy obsession with breakfast tacos? (Or is that just me?)
For the most part, I would rather be at Whataburger some time between 11p and 11m and eat my delicious biscuits and tacos and drink my Simply Orange than go to any other fast food joint.
I guess I'm a little biased when it comes to the whole In-N-Out v. Whataburger thing. I'm from Texas. I've been to the original Whataburger in Corpus, there's a Whataburger not two minutes from my dad's house, and the tiny town that my mother lives in has five (count'em five) Whataburgers for 75,000 people. I am a big fan of Whataburger.
I do have to agree with other Yelpers that the fries are weak sauce here. I'm actually a little disappointed. These aren't the Whataburger fries I am used to. Don't get me wrong, I like them and I think they are better than In-N-Out's fries, but they just aren't the same.