Mexican food in the USA comes in many regional varieties, each a different experience. Maria Felix offered food prepared in ways I'd not yet experienced. We were attending a conference at the Polo Científico Tecnologico across the street (and our hotel was a few blocks away). We ate here twice, once inside with a large group and also on the roof patio with a smaller group.
If your'e expecting food similar to Mexican restaurants in the USA, you'll likely be disappointed. We enjoyed the variety of food experience and the different ways that Maria Felix prepared familiar dishes.
Ring the bell for entry, and be prepared to climb stairs to the dining area and roof top patio.