We like Mad Mex and this location is a solid 3 stars. The location isn't the largest in the Pittsburgh area, but they don't appear to get super busy.
We tried this location at about 7:30 on a Saturday night and there wasn't a wait and we were sat right away.
The food is good and the menu is the same as the other Mad Mex locations.
Pros:
The food is good
The service is prompt and friendly
The place is clean
Cons:
The parking can be tricky as the plaza it's in is busy