I work in a weird part of town that is mostly industrial or fast food, and I became aware of this shop when they delivered a flyer to my office.
I've become a huge fan not only because I'm a Mexican food junkie, but I love that they'll deliver to my area.
Most of the fare is traditional, but they do have some American options for your less adventurous co-workers.
I have never had a bad meal here, and most have been great. I particularly dig the chimichangas.