I spent last weekend with my in-laws in Pittsburgh and was fortunate enough to have gone to MAD MEX in Oakland. What a GREAT restaurant!!! The food was fantastic and they don't carry a mass-produced beer in the place (all microbrews and lots of them!!). On top of that, the service was outstanding (I used to work as a waiter for many years and appreciate good service)! If anyone is in Pittsburgh, likes TexMex/Southwestern/Mexican cuisine, please do yourself a favor and find this place (sorry, I don't have the address, but it was in Oakland). You should call for reservations (we waited 1 hour).
Pittsburgh, PA