It's a great apartment with the exception of the master bedroom,
It faces the street and the commercial shops on the ground floor blast their speakers until 10 pm every night, on the weekends the drunks and the police with sirens are loud all night not to mention that the street is cobblestone and all vehicles, especially delivery trucks and buses make lots of noise. There are deliveries of goods for the ground floor business every morning starting t around 5 am, with pallet jacks full of of goods being dragged off the trucks scraping metal on metal, so you will not get any sleep if you get that room.
A solution would be sound proofing the windows.
Otherwise the apartment is in a great location with easy access to the Zócalo, Cathedral and Centro Histórico.