Mostly I go there for the fantastic fries. Unfortunately I tend to go later in the day, and evening is a really bad time to go there for food. It's not AS bad during the week but on the weekend the place fills up with college students and terrible local music.
That said the food really is pretty good. Last I knew it was also reasonably priced, but they don't have an online menu. Which is weird, I'm pretty sure they used to. It's 2012, I really can't think of any reason why they wouldn't have a website with this information but all I can find is their MySpace and Facebook pages which don't give much info. (their fries are so good, though)
Edit: So I was discussing Cojones with a friend of mine when I remembered that the first (and last) time I ever ordered a bean burrito there, I thought it was pretty awful. When the server asked how everything was, I told her the burrito was not very good at all and ordered something to replace it; a few minutes later, the cook came up to our table and yelled at me for ordering food I didn't like. With that memory in mind along with the lack of website (I usually get take-out anymore because of the aforementioned college kids + music situation, and no website means it's harder to order when I lose my copy of the menu), I'm probably going to try Don Lucho's next time I want Tex-Mex.