I have taken two tours by Estacion Mexico: "Santo Ring Lucha Libre and Pulque" and a tip-based walking tour called "Historic Downtown Walking Tour."
"Santo Ring Lucha Libre and Pulque"
Honestly, I felt disappointed at this tour as it was very disorganized and had too many people to do what they promised to do. The tour was supposed to start at 8 pm, which I thought it was quite late. When I got to the meeting point, there were so many guides/staff. I was asked to wait for a while to have all the people show up. The tour didn't start until 8:30ish. First, all of us were taken to a very very crowded bar where they supposed to let us try pulque. The bar was too crowded to even to go inside, let alone to "taste" pulque or any other things they were pouring. By the time they took us to the arena, it was already past 9:00 pm. When we entered the arena, the guide had a hard time finding seats for all of us. We were asked to sit separately since all the "assigned" seats were taken by someone else. The most disappointing thing was that we could only see 2-3 matches. I saw a ticket and it was sold for 20 pesos, about US$10. If you can get a ticket on your own, you should just get it and go there, rather than joining this tour.
"Historic Downtown Walking Tour" - tip-based tour
Unlike the Lucha Libre Tour, I highly recommend anyone to take this tour. I believe there were close to 200 people who joined the tour on that day, but the organizers/coordinators well managed the overwhelming numbers of participants. Our tour guide was very knowledgeable and make sure to answer all of our questions thoroughly. I learned a lot about the history of the city and people of Mexico.