I have been to Frontera many times and to Topolobampo once. Frontera is great and it is a favorite in Chicago. I have all of Rick Bayless’s cookbooks – I guess that I am a fan.
I have had the chiles rellenos only once and have been denied them many times – kind of frustrating, almost a running joke. They are great though – they are identical to those served at the San Angel Inn in Mexico City.
Frontera is very popular. I estimate that you’ll wait 90 min for a table if you arrive at 7:00P on a Thursday evening. Go early in the week, get there early, and even then you might not be among the first group seated.
Topolobampo was very good and very expensive – about $225 for our group of three with no wine. I’m glad we went, but we probably won’t go back – there other fine dining options to explore in this great restaurant town.
Go to http://www.chicagoreader.com and search for them in the restaurant section. There are many comments posted.