I have only eaten the mexican chocolate brownie without cinnamon. I wouldn't have thought they could screw up a brownie sundae but they did. The brownie tasted like a boxed brownie that had sat in a fridge for a while and was microwaved. The iced cream was a bit hard, as if it too had sat in the freezer since last summer and was now being served. I realize it is a bar/mexican restaurant, but if they are going to make desserts so poorly they should take them off of the menu. Also, the edge of the plate looked to be dirty.
I was there during happy hour. The service was prompt. They have a good selection of beer. If I were to return to Mad Mex, I would go for drink specials and nothing else.
The patio looks nice in the summer if you're looking to have a drink in the sun.