Pretty much everything you can order here is good. At least from my experience, after visiting ore than 10 times, ive never found anything I didnt like.
It has several "restaurants" under the same name, and all are good, but for the ambience, the best is by far the one in Palma street, close to the Zocalo in downtown Mexico City.
If you go for breakfast, try the Concha (delicious and fresh sweetbread) and if you dont mind the calories ask for it with "nata" a very heavy cream like the one you have with scones.
For lunch, there will probably be a couple of powerlunches happening around because of the proximity of several important governemnt offices including the Central Bank and the Supreme Court. Try the very traditional "sopa de fideo seco" as a starter or the cheese wrapped with pumpkin flowers. For your main dish i remember always loving the days specials. Ask the waiter.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC