I love Mexican food. I live across from the Fajita Grill. I have only been there twice (in 4 years).
As many of the other reviewers have said, the food is sub-par Mexican food. I appreciated the complementary chips and salsa, and the incredibly unhealthy Boat Dip was pretty decent. I had the Tofu Mexicana, which was mushy tofu and overcooked vegetables. As hit or miss as Mad Mex can be, since it opened I have been there more times than Fajita Grill.
It is BYOB, but when I eat Mexican I want an ice cold margarita. They also charge for sharing plates ($2.50) and ask that you split your check prior to ordering.