Nadya was our tour guide during the 3 hour walking tour. It was an amazing experience, I am from Switzerland living in Mexico (Ixtapa-Zihuatanejo) since 8 years and have been to CDMX already many many times, but this time is when I learned the most I guess (Did the tour in English because of my aunt who feels more confident in English than Spanish yet) Her English was excellent, she explained everything very well and also connecting history and places, it was very easy to follow her. I would highly recommend this tour!