Amazing location, accommodations and overall stay. Would recommend.
Two things that i would mention:
1) the pillows could've been softer/comfier
2) While this is unrelated to the stay at Casai, while walking just around the corner of the apartment, I was stopped by police my first night. They questioned me, frisked me and stole $100 dollars from me. I've since learned that this happens more often to tourists than you might expect in Mexico City. I was also told that it happens even more around the christmas holiday. I would suggest that you be careful when walking at night in the neighborhood, especially by yourself, as police may target you for money. Fyi, their approach was friendly at first and they stated that this was a routine check. I would carry just a few dollars or whatever you wouldn't mind losing in the event that this happens ton you. Overall this was the only issue throughout the entire trip in CDMX.