Considered by many to be the best Mexican in Hungary, this is, for me, easily one of the best restaurants in the capital. Quality food, with lots of options, including tasty vegetarian ones. Original ideas, house specialities and a choice of spice levels means that everyone can find something they will enjoy. The service is also very efficient and friendly.
It's very popular, and gets extremely crowded in the evenings. You'll want to book ahead after 7pm and weekends. But it's open all day, and you can find plenty of empty tables outside peak times, say 4pm.