It is in a tiny shopping strip next to a Texaco on Hillcroft just south of 59. I am particular about Mexican food - I'm originally from El Paso, and am not a fan of the Mexican food I tend to find elsewhere. But this place is about the best I've had in the short time I've been in Houston. I've especially liked the milanesa and the tampiquena con dos enchiladas is awesome! I had the tacos with fajita carne the other day and was not nearly as impressed.
They are open until very late and on the weekends they serve menudo, though I haven't had that yet.
Any suggestions for other very good taquerias or mexican restaurants would be appreciated.