Welcoming host and very smooth check-in via the doorman. Keyless entry was a big plus. Great location with everything one could possibly need within a few minutes' walk. I very much valued the peace and quiet, as well as the ability to sleep in when needed, despite the apartment being in a busy area of Mexico City. Amenities-wise everything was fine minus the lack of an iron/ironing board and an electric kettle. No stars taken off because I'm sure Bren would have these things ready for my next stay.
Unrelated Pro Tip: avoid the police in Mexico City at all costs! They are professional thieves dressed in uniform. If any try to talk to you, just say 'no hablo inglés' and keep walking.