I'm a big fan of Mad Mex, but this location in particular seems to have some problems. Service is unusually slow and inattentive. On our most recent visit, they advertised the return of the Gobblerito and Pumking beer for one day only. After we were seated, we were told that both had sold out. If you don't have a heavily advertised item available, it's probably a good idea to inform your customers before they are seated.
I'd recommend both the Shadyside and Monroeville locations over this one.