Chipotle is my wife's present favorite, I think it's decent but we mostly go there to make her happy. I was really bummed when they dropped the chorizo, it wasn't quite the real thing but was still good. Mostly have had barbacoa otherwise, maybe will go with carnitas next time for something different. I like that their hot sauce actually has some heat and I don't need to add Cholula or whatever. Have never gotten sick from Chipotle, it has happened with Taco [censored] but I still love that place as a guilty pleasure.
Qdoba is also in the area and I keep thinking their food will be better, but am always disappointed.
The best chain food of this type I have ever had is Baja Fresh in LA, much better than Chipotle and just plain really good food. When I am in Chicago, I still know some places on the West Side that are just primo for casual Mexican and I can also get a horchata.