They were having "spirit night" for my kids school at Pollo Loco on South Rice (not sure why they picked a place so far away) so we tried it out. Food was fine but the place was a total ****hole. Dirty tables, dirty pass through, dirty bathrooms.
I'm not surprised they would have trouble here if that's a typical store.
A lot of times, the success or failure of a chain like that is totally dependent on the quality of the franchisee and over site of the franchisor.. Look at Schlotzkys and Quizo's for example.