Some things kept throwing me off like furniture and lamps were in the wrong decades. In the lobby scene when Maria Felix was working for a plastic surgeon during the late 30s/early 40s, the chairs were 60s danish modern, and the lights were from the 50s. Likewise the sofa and chairs in Augustine Lara's house in the late 40s were from the early 70s, and the dining table was 60s. It was distracting and made following the story confusing. It was obvious the set designer went into an antique shop, grabbed everything retro they could lay their hands on and figured it would cover an entire 40 year period. Also, at one point in the late 30s they show black and white footage of Mexico City and judging from the cars it was from some time in the 60s. The costumes were beautifully done though.
The other thing that threw me off was the final actor to portray Enrique Alvarez Felix who looked nothing like the previous actor so it took me a while to figure out who he was. He was also short, slim and tan, where as the real Enrique Alvarez Felix was quite tall and fair skinned. I think the actor who played his partner, Juan would've been a better pick. I also seem to have missed how Maria Felix's brother died at military school. I don't think that was ever explained or addressed. Otherwise I'd say it was fairly well acted.